Jason's is a good, solid lunch choice. They have a HUGE selection of sandwiches/soups/salads, and the salad bar, which has the usual stuff, and some surprising stuff as well (hummus, anyone? holla!). Good sandwiches, decent portions, all around good pick.
That being said - if you're coming for a weekday lunch, you MUST arrive between 11:20-11:35 to avoid an out-the-door line. I'm sure it moves pretty quickly, but if you are with a group of 3 or 4 and want to find a seat without stalking someone that is aaaaalmost finished with that last bite of pickle, you gotta get there early.