I've been using AirBnB for over a year now, and to this date Judy's place has been the best I've stayed at by far.
The apt. is spacious, super clean and has everything you need. It's well located (Cupertino, right on Steven's Creek) and you have many places to eat around.

All of this doesn't matter much when you get to describe the hosts. Judy and her husband Kevin are the nicest persons I've met on my travels. They invited us to their home for dessert, Kevin gave us a tour of his workplace and when we had any questions they replied instantly. If you're going to the Bay Area and you don't need to be in the city it'd be foolish to stay somewhere else, trust me on this one.