I love PB, this one in particular. I worked there in High School (eons ago). I really feel like this location tries harder than the free standing stores since there is so much competition in the food court.
The cookies are better, the sandwiches just taste like more care was put into their making, and the staff is friendly and efficient. The salads are more carefully crafted and are not drowning in dressing.
I don't know if it is the training or what, but I feel like the effort the staff puts out shows their commitment to good food, and their pride in their work.