I've been to a couple other Big Fat's around. They are pretty much all the same. Which is good, when you are a chain restaurant.
I came in for lunch. Was seated promptly, and approached my a server promptly. The food was even delivered promptly, which are the 3 most important things to have during lunch service.
They have a $5 lunch special for any of their pitas, add $1 for a salad or fries. It's a fair deal.
As for as lunch goes, the Tempe Big Fat did it right.