There is a Chinese steam table restaurant on Sacramento Street (near Sansome) which is described as "overpriced" or "Panda-express-like" in the few reviews I've seen. Nevertheless, it's always packed at lunch - probably because it's the nearest place for many people to grab a bite.
Having been dragged there last week I noticed some Burmese dishes on a chalk board and ordered the Burmese garlic chicken. I found it very substantially better than anything else on the menu. It's certainly not Burma Superstar, but it was a pleasant surprise.