It's located on the south side of the connection between the Colonial Arcade (to the east) and the Euclid (or 5th St) Arcade (to the west); it's closer to the 5th St Arcade side.
They only accept cash. There is an ATM right next to the restaurant. The lady behind the counter is very friendly and directs newcomers on the menu.
The portions are large in terms of the combo plates. I got the chicken kabob combo. You get 2 grilled kabobs (chicken and - a few - onion slices) over a bed of rice that fills half the plate. The meat is grilled fresh to order and you can watch it cook. The other half of the plate is salad, which had a lot of dressing on it to the point that it was puddling in the bottom of the plate. There was also 1 large pita provided. They also offer a quarter sized container of sauce to go with your lunch - I got the garlic sauce. I got a side of hummus which was really good and thick.