I don't mind the holding after landing the lead against a fast dangerous opponent, its the smart thing to do, and Mayweather and Roy Jones and Hopkins do it all the time, but Berto is wide open when he is in clinches, like you said, he doesn't do a great job of tying his opponent up on the inside. Despite ahve rigid legs, he still moves very well, and IMO is a better pure boxer than Mosley, but I've never been a huge fan of Mosley. I just think they are both too robotic.