Mr. Coffee 2129512 5-Cup Coffee Maker: Compact and Convenient Personal Brewer

Published on July 19, 2023, 5:46 p.m.

The aroma of coffee wafts through every corner of the world, carrying with it a rich history and deep cultural heritage. From its accidental discovery in Ethiopia to its gradual popularity in the Arab world, its flourishing in Europe, and its spread to the Americas, the journey of coffee beans has witnessed the development of human civilization. Today, coffee has become one of the most popular beverages in the world, not only a source of energy to awaken the morning but also a lubricant for social interaction and a symbol of a lifestyle.

Kickstart your mornings with the Mr. Coffee 2129512 5-Cup Mini Brew Switch Coffee Maker, your personal barista in a compact package. Whether you’re a college student cramming for exams or a busy professional rushing out the door, this petite powerhouse delivers fresh, flavorful coffee in minutes, all at the touch of a button. This review will examine the key features, design, performance, ease of use, and value of this mini coffee maker.


The Mr. Coffee 2129512 brews up to 5 cups (25 oz) of coffee at a time, ideal for 1-2 people. Operate with ease using the intuitive one-touch on/off button and never miss a sipwith the convenient Grab-A-Cup auto-pause feature, allowing you to pour a cup mid-brew without disrupting the process. The updated carafe boasts clear ounce markings for effortless measuring, ensuring you get the perfect amount of coffee every time. This coffee maker is lightweight and compact, great for RVs, apartments, dorms and offices.

 Mr. Coffee 2129512 Coffee Maker

Key Features

  • Brews up to 5 cups
  • Grab-A-Cup auto pause
  • Easy-view water window
  • Lift & Clean filter basket
  • Ounce markings on carafe
  • On/Off indicator light
  • 2 hour auto shutoff
  • 650 watts power

Coffee Brewing Principles

A cup of rich coffee hides a wonderful scientific principle. The aromatic and flavorful components in coffee beans are gradually dissolved into water through the steps of grinding, adding water, and extraction, eventually forming the coffee we taste. Factors such as grind size, water temperature, water quality, and extraction time can all affect the final taste of the coffee.

Mr. Coffee 2129512 Coffee Maker Principle

The Mr. Coffee 2129512 Coffee Maker uses a drip extraction method, evenly pouring hot water over the ground coffee powder to fully dissolve the soluble substances in the coffee into the water. The machine is equipped with a 650-watt heating element that can quickly heat water to the ideal temperature, and it adopts a showerhead design to ensure that hot water is evenly distributed on the coffee powder surface, maximizing the extraction of coffee aroma and flavor.

Features and Design

This Mr. Coffee 2129512 Coffee Maker has a simple, no-frills design with classic black plastic housing and accents. It measures 10.7” deep x 9.8” wide x 7.2” high, making it easy to tuck away on a counter or in a cabinet. The water reservoir is clear so you can easily see the water level, and features ounce markings on the side.

The control panel consists of a single ON/OFF button for starting and stopping the brew cycle. When powered on, a red indicator light lets you know the unit is heating up and brewing. Other highlights include the Grab-A-Cup Auto Pause feature which allows you to pour a cup mid-brew, and the easy access lift-and-clean filter basket.

Ease of Use

Simplicity is at the heart of the Mr. Coffee 2129512 Coffee Maker. Even the most novice coffee connoisseur can master this machine with ease. Simply fill the water reservoir to your desired level, add your favorite filter and ground coffee, and press the intuitive on/off button. In a matter of minutes, you’ll be enjoying a steaming cup of freshly brewed coffee. As one user aptly put it, “This coffee maker is so easy to use, my kids can even make it for me!”. The automatic shutoff kicks in after 2 hours for safety and energy savings.

The removable filter basket and glass carafe lift out for quick and simple cleanup. Users note the convenience of being able to brew just 1-2 cups at a time instead of a full pot.

Brew Performance

Despite its compact size, the Mr. Coffee 2129512 Coffee Maker delivers a surprisingly robust and flavorful brew. The 650-watt heating element ensures rapid water heating, while the showerhead design evenly distributes water over the coffee grounds, extracting the full richness and aroma. Users rave about the coffee’s bold, satisfying taste, and the brewing process is complete in a mere 5 minutes. While some reviewers have noted occasional filter seepage, using 5-cup basket filters instead of the included 4-cup filters can effectively eliminate this issue.

One downside is that included filters are prone to letting some grounds pass through. Using 5-cup basket filters instead of the included 4-cup filters can help alleviate this issue.

Noise Level

This is a fairly quiet mini coffee maker. It doesn’t have the loud brewing sounds or extensive pumping and gurgling noises of pricier machines. The brewing process produces a gentle hum that shouldn’t disturb others. The auto shutoff means no annoying drips or brewing sounds left on.

 Mr. Coffee 2129512 Coffee Maker


Maintaining the Mr. Coffee 2129512 Coffee Maker is a breeze. The removable filter basket and glass carafe simply lift out for easy handwashing with soap and water. No decalcification is required, saving you time and effort. Reviewers appreciate the lack of intricate parts or tubes, making cleaning a quick and hassle-free task. For added convenience, consider handwashing the carafe and avoiding the dishwasher to extend its lifespan.

Use Cases

The 5 cup capacity and small footprint make this coffee maker ideal for college dorms, RVs, campers, office desks, tiny apartments, or anywhere space is limited. It’s also good for single people or couples who don’t need large batches of coffee.

Analyzing User Reviews

With over 20,000 customer ratings on Amazon, this miniature Mr. Coffee 2129512 Coffee Maker has accumulated ample feedback. The average rating stands at a solid 4.5 out of 5 stars, indicating overall customer satisfaction.

The vast majority of reviews applaud the coffee maker’s ability to produce a bold, satisfying brew in a petite package. Many delight over the convenience of single-cup pouring and space-saving size. They find it makes coffee just as flavorful as larger models, with the simplicity of one-touch operation.

However, a minority of critical reviews cite flimsy plastic construction and faulty filtration as drawbacks. Some report the included 4-cup filters allow ground seepage, compelling them to purchase unapproved 5-cup alternatives. Others mention the glass carafe cracked after several months of daily use.

In response to carafe concerns, verified purchasers recommend hand washing only and careful handling to prolong its life. They remind buyers this is an affordable, entry-level brewer made entirely of plastic and glass. Most agree minor flaws are forgivable given the low price point and reliable performance.

In summary, feedback indicates the Mr. Coffee 5-cup coffee maker consistently exceeds expectations for an ultra-budget model. Consumers praise its convenience for single servings, straightforward use, and bold brew. While build quality does not match premium brands, owners feel satisfied with the value. The majority would recommend this compact machine as a starter coffee maker or office addition despite a few compromises.


  • Compact size great for small spaces
  • Makes up to 5 cups
  • Auto pause lets you pour a cup before brewing finishes
  • Easy one button operation
  • Carafe has clear markings for measurements
  • Produces good tasting coffee
  • Budget friendly price
  • Lightweight and portable


  • Mostly plastic construction feels a bit flimsy
  • Carafe handle is small and awkward to hold
  • Water reservoir could be larger
  • Brewing time is slower than higher end models


With an MSRP of $24.99, this budget-friendly Mr. Coffee 2129512 Coffee Maker is a great value. It makes good coffee without taking up much space. The simple operation and useful features make it perfect for dorms, offices, RVs and other small setups.


Elevate your coffee experience with the Mr. Coffee 2129512 Coffee Maker, your compact companion for brewing exceptional coffee at home, in the office, or on the go. This petite powerhouse consistently delivers rich, flavorful coffee in minutes, all without sacrificing precious counter space. Its simple operation, automatic features, and budget-friendly price make it an ideal choice for coffee enthusiasts of all levels. Embrace the convenience and quality of fresh, barista-style coffee at your fingertips – order your Mr. Coffee 2129512 Coffee Maker today! This compact Mr. Coffee delivers hot, fresh coffee for one or two anytime.


  • Brews up to 5 cups (25 oz)
  • Product Dimensions: 10.7”D x 9.8”W x 7.2”H
  • Special Features: Easy-to-view water window, Compact, Auto Pause
  • Coffee Maker Type: Drip Coffee Machine
  • Wattage: 650 watts
  • Voltage: 110 Volts
  • Material: Glass, Plastic
  • Control: Single ON/OFF button

Box Contents

The box includes the Mr. Coffee 2129512 Coffee Maker unit, glass carafe with lid, reusable flat bottom filter, user guide, and warranty information. No coffee filters or coffee are included.

Mr. Coffee 2129512 Coffee Maker User Manual

1. Preparation

  • Place the coffee maker on a flat, level surface.
  • Place the glass carafe on the warming plate.
  • Open the water tank lid and add an appropriate amount of cold water.
  • Place the filter basket in the filter basket holder.* Add an appropriate amount of coffee powder.

2. Brewing Coffee

  • Turn off the power switch.
  • Plug the power cord into the power outlet.
  • Turn on the power switch.
  • The coffee maker starts working, and hot water will be evenly poured over the coffee powder through the showerhead to extract the coffee.

3. Completion

  • Once the extraction is complete, the coffee will flow into the glass carafe.
  • Turn off the power switch.
  • Remove the glass carafe from the warming plate.
  • Enjoy your delicious coffee.

Common Troubleshooting

Problem: The coffee maker does not work.


  • Make sure the power cord is properly plugged into the power outlet.
  • Check that the power switch is turned on.
  • Check if there is water in the water tank.

Problem: The coffee tastes too weak.


  • Increase the amount of coffee powder.
  • Use a finer grind size.

Problem: The coffee tastes too bitter.


  • Decrease the amount of coffee powder.
  • Use a coarser grind size.

Problem: The coffee maker leaks.


  • Check that the water tank lid is sealed properly.
  • Check that the filter basket is placed correctly.
  • Check for cracks or damage to the glass carafe.

Frequently Asked Questions

What are the dimensions of the Mr. Coffee 2129512 5-Cup Coffee Maker?

The Mr. Coffee 2129512 5-Cup Coffee Maker measures 10.7 inches deep, 9.8 inches wide, and 7.2 inches high. It weighs 2.79 pounds.

What is the capacity of the Mr. Coffee 2129512 5-Cup Coffee Maker?

The Mr. Coffee 2129512 5-Cup Coffee Maker can brew up to 25 ounces of coffee, which is equivalent to five 12-ounce cups.

What type of coffee filter does the Mr. Coffee 2129512 5-Cup Coffee Maker use?

The Mr. Coffee 2129512 5-Cup Coffee Maker uses a standard 5-cup basket-style coffee filter.

Does the Mr. Coffee 2129512 5-Cup Coffee Maker have a keep warm function?

Yes, the Mr. Coffee 2129512 5-Cup Coffee Maker has a keep warm function that will keep your coffee hot for up to 2 hours after brewing.

What is the warranty on the Mr. Coffee 2129512 5-Cup Coffee Maker?

The Mr. Coffee 2129512 5-Cup Coffee Maker comes with a one-year limited warranty.


  • Use fresh, cold water for the best tasting coffee.
  • Clean the coffee maker after each use to prevent build-up of coffee oils and residue.
  • Descale the coffee maker every few months to remove mineral deposits.
  • Use the correct amount of coffee grounds for the desired strength of coffee.
  • Store the coffee maker in a cool, dry place.