I have one and love it. I had the Senseo before this one and didn't really like it as much.
Kohl's also has the k-cups.
They also sell a little cup/filter thing that you can use to put your own coffee in it so you don't have to buy the k-cups(which can get pricey).
Amazon.com: Keurig My K-Cup Reusable Coffee Filter: Home & Garden
I've seen these in Target and Wal-Mart too.