Got a Keurig for my wife as a Christmas present three years ago. Generated about 10 cups of coffee per week, and was very happy with the product. Performed the de-scaling maintenance regularly....still broke down after about a year and a half. Went online to see how to repair it, and wasn't encouraged by the number of similar stories.
I guess the manufacturing giants have succeeded in making us believe electronic consumer goods shouldn't last long.
"Good" - Keurig coffee is good enough for me. I don't think I have the palate to discern the difference between my K-cup and the $7/cup coffee in the high end cafes.
"Cheap" - I don't have the time to prepare drip coffee in the morning (or prepare the night before) so for me it's either Kcup or purchase at work. So Keurig is the cheapest option for me.