Been going here for years. I've probably had maybe one or two things wrong with my order that entire time.
The only problem I can recall is when I got stale hot dog buns. They were extremely hard and stale, should of been caught, but that was the only thing that sticks out and it was months ago. I haven't had any problems since.
Most of the times I've went is with a large group, and I can't recall any times when other peoples orders were messed up either.