How big is the Keurig K-Mini Mate, and will it fit a small counter or dorm room?
The full footprint is 9.34 inches deep by 3.94 inches wide by 9.46 inches tall, and it weighs 3.9 pounds, light enough to move with one hand. The 3.94-inch width is the number that matters for tight spaces: it's narrow enough for a slim counter strip, a dorm shelf or a desk corner. The tradeoff for that footprint is a one-cup reservoir, so it brews one cup at a time rather than working as a multi-brew station.
How much coffee does it brew per cup, and do I need to refill it every time?
The reservoir holds up to 12 fluid ounces, and yes, you fill it before each brew. That's the direct tradeoff for the compact 3.94-inch-wide body: convenient to store, but no back-to-back brewing without a refill trip to the sink between cups. It also means no water sits in a tank going stale between uses, a small upside to the refill-every-time design.
Will my travel mug fit under the spout?
Keurig gives clearance for a to-go cup up to 7.25 inches tall, so most travel mugs should fit under the spout. If yours runs taller, check its exact height against that figure before buying. An ordinary 12-ounce mug fits comfortably too.
What kind of pods does it use, and is a reusable filter included?
It takes standard K-Cup pods and brews fully automatically. Keurig includes a filter in the box, and reusable K-Cups work as well: refillable pods, including perforated stainless steel ones, fit well and make good coffee. It runs from an AC adapter, so it needs to sit near an outlet.
Is the K-Mini Mate worth it?
For one person in a small space, yes. It does well on compact size, ease of use, brewing speed, looks and coffee quality, with coffee temperature the only point where opinion is mixed. It is a simple, fairly basic machine, and if that is exactly what you want, it is good value.
What are its main drawbacks?
Coffee temperature is the one point where opinion splits: it can come out hot or even piping hot, but not hot enough for everyone, so if you like yours very hot, treat that as the open question. Beyond that, the complaints are practical ones built into the design: you refill the water for every cup, and brewing can splash a little around the machine.