Get a Lunch or Dinner box. You can make any minor substitutions with little hassle if its not perfect and its a ton of food for $5.95/$7.95 (lunch/dinner). Also they deliver and there is always a free table inside. It isn't gourmet food by any means, but it does a great job for what it is: cheap american-chinese food with a decent flavor that isn't excessively greasy.
If you're going to get full plate meals instead of a box, go down the street to thai cuisine, more expensive, but better food.
Check out a menu to order delivery:
www.waiwaipgh.com