For the price, an amazing rack unit. Though plastic, it's tough and rugged, and protects equipment from the rolling about on my trolly, being the only way to currently transport it.
The case itself has two latches on either side, both front and back (as seen), but no way of locking the lids to the case - easy to do with a pair of kensington locks, but would have been nice to have some form of holes for padlocks built into the catches - If you're gonna be leaving your gear alone, I'd recommend getting some anyway, but be aware you may need something extra to keep the lids on.
The internal fram for holding rack units may not be in the exact position required, however it's easy to bend the frame back into place, and once done will remain that way - I assume it was made like this to ensure a snug fit once mounted up.
Overall, an amazing case at great value, but there are a few little bits of information that it would have been nice to know at the time of purchase.