There are really bad working conditions in the warehouses. Mine was 1 million square feet (don't know what that is in meters) and often there's so many employees there you get lost in the shuffle. It's heavily regulated too. There's cameras everywhere and one at every station that you work at. There's airport like security going in and out including an x-ray machines to monitor your lunch boxes and stuff. Also there's a rule that no cell phones are allowed on the floor (or even through security) because they want to protect company secrets.

TL; DR It's pretty bad.