Well, Square on Square doesn't really sound like a Chinese food place, but that's what it is. The location is great, right in the heart of Center City, Philadelphia. The decor is very nice, the price is right, and the food is really good.
My favorite dish is the Chicken and Eggplant in Garlic Sauce. Yum. It's a bit hot but not burn your mouth off spicy. My friend Liz always orders the Chicken and Asparagus, which she swears is great. The waiters work really hard at this place. There's an upstairs and a downstairs and they are constantly running up and down those stairs. We always marvel at just how hard they work and try to tip a little extra. I mean, try and imagine yourself climbing those stairs 300 times a day carrying heavy trays!
Lunch gets really crowded at this place. You either need to get there before 12:00 or after 1, or expect to wait a bit for a table. The service is usually pretty quick, though, so you shouldn't have to wait too long.
Overall, a great place for eat-in Chinese food.