Sammy's is reliable. Inexpensive lunch time food and lots of fresh and healthy options. Veg friendly which gets a plus in my books. I especially like that they have a different curry and soup every day so things don't get boring.
The atmosphere is cafeteria-y. You order at the counter, get your food on a tray and pay up front. The room itself and tables are really nice but that's because it is located in Hart House, one of the nicest buildings on campus.