I have two, 2 tap homeowner style kegerators. Costco was clearing them out many years ago. They were originally single tower, but I changed that. Two corny's in each one. That's plenty of capacity for me. They work great. I bought them before I was even homebrewing.
If all you need is one or two taps, then go for it. But as others have said, sometimes two just isn't enough. I had a chance to buy a True commerical style kegerator about a year ago for only $200. Nice little machine, but was very loud. I passed.