I had a Exo swing door tank for a short time holding my 6ft BRB. He is super active and loves to explore and burrow. He was never able to escape the tank and he grew up in the tank with his previous owner.
I do prefer the sliding top style. I still use two of them. I have one for my hoggy and one for my ball. The ball needed a bit of work but I cant say that I think it is difficult to keep it right.