Two words: cheap, delicious. Easily one of the best lunches in Madison. The Lamb/Beef shwarma is my favorite, either in a sandwich or added to the top of a greek salad. The tahini can be a bit overwhelming if you're not its biggest fan, but you can always sub it out for the cucumber yogurt instead. Also delicious is the Avgo soup. The people who work here are super-friendly and food is ready in a flash.
The place is always really crowded, but the food is worth the wait. If it's a nice day, just get your food to go. Cash only, so be prepared for that.