Love our Keurig! When all 3 girls were still at home and we had a regular drip machine, we'd waste so much coffee because they would say "Yeah, I want coffee in the morning." So we'd brew a whole pot, then they'd be running late for work and not drink any. I ended up tossing so much coffee. Now, even with 2 of the three on their own, we only make what we are drinking. And I like having the variety of coffees (no flavored here, tho! Yuck), and some tea on hand.
We buy our k-cups from Coffee For Less. Lots of variety and decent prices. We also pick up the huge box of the Newman's Own coffee at Sam's. That's one of our favorites so having a bunch of it around is good.
We love the thing so much, we bought the travel size machine! No more awful hotel coffee! Yay!