PA-PLAYA I used Uber twice, and both times I was quite happy with the service they provided. It won't be a regular thing, for sure, especially if I've got other options. But if I'm in a pinch - I'd feel fairly comfortable using them again.
govols We used it when we went to San Francisco a couple of years ago. It worked great. We got to do more and see more since we didn't have to worry about finding our way and parking.