One tbh disadvantage has me switching back to Langs from tbhs. And it's something you should consider before choosing a tbh. Will you need to move your tbh? And do you have access to the equipment to do so?
I've returned to Wyoming where beekeeping requires me to move at least twice a year. Previously, I had a full size pickup, a ramp, a hand cart and some help if I needed it. With this stuff, moving tbhs was easier and safer than moving Langs.
But today, I have a toy truck, no ramp and no help. The toy truck is too small to use with the hand cart. And tbhs are just too heavy and too hard to handle by myself.
Langs have a small footprint. They are modular and can be disassembled, which makes them easier and possible to move in my current situation. This factor along has forced me to switch from tbhs to Langs.
Something to think about.