We just got our first Keurig one cup coffee maker a few days ago. And it makes a good cup of coffee. But, my husband and I only drink 1 cup of coffee a day, so not too expensive. And we also use the reusable cup filter instead of buying the individual cups. That's saves you even more. But, the only reason we bought it is because my husband works at Lowe's and the new models came in and so the display of the old version was the last one. Well, he ended up getting it for $10! So we HAD to get it.
So if you only drink 1-2 cups of coffee a day, it's worth it to get a Keurig.