Overrated, overrated, overrated! This is in pretty much all of the guide books on San Francisco but personally, I don't think it is worth it. Prices are high for Chinese food and while I'm not exactly opposed to that, there are many other Chinese restaurants that are as good/better for the prices you pay here. There is always a long line out front as well. If you want similar food, I'd probably direct you to Chef Jia's for a lower price... all in all, there are just many other Chinese restaurants I'd recommend. I will concede that if you like Sweet & Sour, either of these restaurants are probably up your alley.
Personally, I'd hit R&G Lounge.