When I was a little kid I used to work here folding pizza boxes at a quarter per box, and then drop the quarters into Donkey Kong. While my employment was probably illegal, to this day I am a formidable Donkey Kong player.
Back then, the pizza was OK, as were the hoagies, but there were no cheesesteaks.
Today, the reason to go to Campus Corner is the cheesesteaks. I think they're as good as any in the city (including Geno's and Pat's). They get the bread right, the meat is of reasonable quality, and the cheese and onions are perfect.
So if you find yourself near the Villanova campus in need of late night food, definitely give Campus Corner a call - an added benefit is that they deliver until very, very late.