It's not bad to be honest, I mean it's not amazing but it's fun. I spent about 8 hours playing it last night, got retired after going 14-10 on one career, then imported Nick Diaz and I'm 20-0 going for my title shot now, the training is cool in that you can do it get a rank A and then just simulate all future training in it. The injuries you get from training can be a bit annoying and the challenges also, when you're a rank 30 fighter with 75 over all and get to fight a pro with 94 stats, I mean you can still win and what not but it's cool.
Not all fights have finished early, I've had a few fights go the distance which is cool. I'm enjoying it a lot I think it's a massive improvement from the previous one, I'm not so sold on the ground game stuff as I still don't fully understand it.