I got one of the clear boxes and am quite pleased with it.
This is by no means a secure box and it wouldn't take much effort to bend the sliding cover so it clears the lock's tongue. So no one should be buying this type of box if they need to keep things safe. This wasn't a concern for me, though. In fact, I would prefer something that somehow held itself in place without an actual lock/key.
The tall back piece fits well and does a good job holding whatever you need to display in the upper area. There is a bit too much flexing in this piece for my taste, though.