China 8 is my favourite Chinese place in Mississauga-- they're cheap, service is friendly and fast, they give huge portions, and their food is really good!
I tend to get the shrimp fried rice, coconut shrimp, beef and black bean noodles, or one of the sweet chicken dishes like sweet and sour chicken or General Tso's. Their crab and cheese wontons are delicious, and you get them for free if you pay cash on orders of over 20 dollars! I really appreciate how good the food is, and I've been coming to them for several months now whenever I need a quick dinner.. they also deliver, which is great!
Nobody really sits inside to eat, except other students honestly. Most of this place's business comes in the way of deliveries and take-aways, so don't judge this place just because it seems empty to you.