Our fridge door will fly open. And we've got a few cabinet drawers that have loosened up and will slide out too. We use those Child Drawer Locks where needed.
As for the quality, I'm not impressed all that much either. But I build cabinets from time to time and if you told me to build you a cabinet that you we're going to put into a truck and shake the snot out of it for a few years, I wouldn't warranty my drawer slides either.