There are two issues with Keurig brewers
On the larger ones there is no way to completly empty them of water so if you use part time the water stagnates. This is not, as near as I can tell, an issue with the K-10 or the MINI I believe they empty every use.
Mountains of spent coffee pods. (Waste)
I use sunbeam it is "4 cup" (Really 5) automatic drip. Fills my 24 oz cup to 20 oz level nicely Uses my choice of pods or ground with filter.. Works great Cheeper. I have a 2nd on standby just in case. it's a store brand (Fred's Discount) and like the Sunbeam used ground or pods.