Personally, I love A8 China. It's been my go-to fast food place since a few years back when I started attending college here. They've always had less than $6 lunch meals, but they have deteriorated in size. (I don't mind. I could stand to eat less haha)
It has the best General Tso's Chicken hands down: sweet and tangy. Asian Kitchen's is usually tough and dry. The crab rangoon here is slightly sweet and damn tasty.
Another thing definitely worth noting: I've eaten there on several occasions and Chinese students frequent it as a popular hangout. It makes sense to me because they actually make some delicious Chinese (non-gwailo) food.
I don't know what all these 1 star reviews are about. No offense, but I'm assuming most of these people have never had real Chinese food (basically not that deep fried, sauce slathered, stuff everyone associates with) since half of my mom is a 1st generation immigrant from Hong Kong. I feel A8 is a more tasty representation than other fast food Chinese I've had in Madison.