I have a keurig and its great for one cup brewing in the mornings before work. On my days off I still grind whole beans and use a french press. But for a quick cup they work great. The only con with the quality that I noticed is that my coffee seems to cool off quicker then other brewing methods. I haven't actually tested this to see if it is so.

The price of the k-cups aren't that much more then beans. I'm not a huge fan of the waste the k-cups produce but there is the option of buying the reusable pod.