Anybody use
DianPing?
Basically users rate restaurants according to various criteria such as taste, service, atmosphere and price, and the website presents the results in a league table style list.
You can search by city, location within city, cuisine type, even specific specialty dishes, so if you like to eat out it's an invaluable way of finding new and quality places to eat both in your area and in cities you don't know well.
It's all in Chinese but you only need to understand a little to navigate, or get a friend to help you. Really useful.