While even the most basic coffeemakers we tested made a good cup of coffee, some features make a machine easier and more convenient to use. Others you won't need. To decide which coffeemaker features you need, consider the list below.
Programmable settings
These allow you to set the time the machine starts to brew, that's helpful if you need that coffee aroma to propel you out of bed. The settings are available on most full-size models.
Thermal carafe/thermal mug
An insulated carafe not only keeps coffee hot for hours but also prevents that "burnt" taste. Some one-cup coffeemakers come with thermal mugs you can take with you.
Small-batch setting
This adjusts water flow to prevent a too-weak brew when making one to four cups.
Brew-strength control
This mechanism diverts water past the coffee grounds to produce a weaker brew. It also slows water flow to produce a stronger brew.
Pause and serve
Impatient? Most machines let you pull away the carafe to fill a cup without spilling coffee all over the countertop. But if you pour after only a cup or two is in the pot, the coffee can be too strong.
Auto shutoff
Forgetful? This feature turns off the heating element automatically. Most machines shut off after a predetermined time span; others let you set the time.
Controls on the side
If you're short on counter space, consider a model that you can turn sideways on the counter so it juts out less.
Longer warranty
Most machines come with a one-year warranty, but some are guaranteed for three years. (Conversely, some lower-priced machines might have only a six-month warranty).
Spare carafe
If you're accident-prone, you might want a model that comes with an extra pot or carafe. A replacement pot can cost $10 to $15 if you buy it separately; thermal carafes go for $25 to $75. If you need a spare pot in which to serve decaffeinated coffee to guests, consider buying a generic thermal carafe at a kitchen store.
Self-clean cycle
There's little need for a special cycle that holds the cleaning solution in the machine longer. Go with running a mix of water and white vinegar, it works just as effectively.
Water filter
This is supposed to eliminate odors and odd-tasting coffee. But you need to replace the filter after a specified number of pots (at about $5 per filter) to prevent bacteria buildup. If you're worried about water quality, a whole-house or faucet filter might be a better choice.
Carafe prewarm
This setting preheats the carafe before the coffee drips in. In theory, that helps keep the coffee warmer longer. But in practice, it doesn't make much difference.
Built-in grinder
These can be annoying to use and clean. The grounds tend to spill, and you might need to upend the machine to empty out the residue. If you like to buy whole beans, get a separate grinder.
Temperature adjustment
You can set the temperature of some hot plates, from about 160 to 190 degrees. But we found that all plates keep coffee hot enough, about 175 degrees.
