I went here for the first time recently. I was in the area and all of the other lunch options in that center didn't look appealing to me.
So you don't look like a total newb - you order your sandwich and that person puts the basic ingredients on it, then sends it through a toaster conveyor belt, when it comes out the other end someone else puts your choices of condiments on it, wraps it up and then you pay and either sit down or leave.
They have a number of choices and it's nice that they list the nutritional details on their menu board. I went with a friend and, totally ignoring the valuable nutritional information, we got the chicken/cheddar and the Italian and shared 1/2 each. Both were pretty good. Certainly not the best sandwiches I've ever had but better than Subway by a mile and much much better than a fast food burger.
Two sandwiches, two fountain drinks - $11. Well worth it.
I'll certainly go back.