Valuev is not a good boxer in a literal sense but to be fair, he is not just big. There are and were other fighters of his size. You never heard of them? Well, guess why.. They _really_ suck. Being of such size has some advantages but also some major disadvantages like slow hand- and footspeed, slow reactions, bad coordination, stamina issues, injury proneness. Valuev did good for his size.
The guy did well, he wasn't very talented but he did the best he could, didn't come in like these other overweight heavyweights. I am quite surprised by some of the heartless and spiteful comment being made in relation to his size, fair enough he's over 7ft but I doubt any of you would like to be constantly berated over your appearance. Come on people, be considerate:good