Extreme Pita's is a reliable, if unexciting, quick lunch spot. The food's ok: there's not really the Mediterranian twist you would expect--you'll find things like Chicken Souvlaki, but also Buffalo Chicken and Thai Beef. It eats, however, and they post the calorie counts for their entrees on the menu, which is great if you like to make sure you're not pigging out during the workweek.
Service is a little brusque, but the staff isn't actually downright rude, and they don't really have time to be chatty during the lunch rush anyways. Also, if you are fortunate enough to have the Ballantyne Corporate discount card, you get 15% off. Find out if you can get that piece o' plastic, and if you can, work it.
It's good to have a healthy fast food options in the area, so if you get tired of Panera, check out this joint.