I'll be brief. If you're a little chubby like me, sometimes the belt buckles dig into your stomach. You can't get it from that. And because the buckle is shaped to prevent that, and because you can set a much more precise level. The only gripe is that the trigger mechanism is too tight to squeeze. Sometimes I have to fiddle around with it. I'd rather release it TOO HARD than TOO EASY, so I can't complain too much here. A few tips for the buyer: Cut the belt as small as possible to fit. It might help to try it on without cutting it off first, just to see how little you can get away with.