I'm not a huge fanatic or anything either, but after watching a little bit it is pretty easy to get into. I mean the conditioning of the athletes is incredible, and I would say that as a general rule there is a lot less long term brain/CNS damage than there is from boxing. Probably because the fights a lot of the time end due to submission, and also the rounds are longer, where in boxing a guy gets beat to almost KO, then goes and sits down for a minute. Then goes back in and beat until almost KO, then sits down. Repeat

I will watch it when my kids aren't around, usually live-pause then speed through a few rounds for a half an hour or so. I make mental notes in case I ever get jumped by ninjas or something, I need to have some moves.