I love my Keurig. Now I make coffee one cup at a time, and it never gets bitter sitting in the pot. I grind my own beans each morning--enough for 4 cups--and use the U-Fill-It cup that came with the machine until 4 cups of decafe are brewed. Then I switch to the K-Cups that I get 80 to the box from Costco.
And those are a pleasure to use.
I'm really stoked on the company. It's here in Vermont with publicly traded stock that's up over 300% this year. That will buy a lot of fabric! :-)