Flimsy, but does the job.
It works, with a bit of effort - if something is stuck to the bottom you got to shake/rattle the box a bit, then it'll come lose alright and roll into the compartment.
However, the locks on the side are few, and they are flimsy, so you got to be cautious to not accidentally open them. With proper locks I'd give it 5 stars, with the flimsy ones I don't trust that this will last.