I can be satisfied by itself, the walls are perhaps a bit too thin and soft, but the devices that are put in add rigidity. :D
In fact, we are quite happy and everything is kept and protected.
In addition, we installed small wheels, so it would be more convenient to transport at gigs.
Actually, I recommend if you drive your own car or van to the gigs. For air and truck transport, you must definitely choose a plywood rack case.