This is my favorite American-style Chinese restaurant in Pittsburgh. I've eaten at quite a few and this place is cheap, consistent, and everything is freshly made right when you order it (yes, its frozen, but they don't do that giant vat of crap simmering all night thing).
The family that runs the place is really nice and they are quick and efficient. If you're looking for gourmet, you're at the wrong place - but if you just want solid, tasty, cheap Chinese food, China Lin's the right place.
As a highlight - their lunch specials at $4.95 and you get a TON of food. GREAT place for lunch.