He was very good, Hall of Fame level but not great, not GOAT. He built up an amazing record fighting in smaller organisations, when the sport was less consolidated and deep than it is now. Not that he ducked anyone. Then he started losing and couldn't face coming down from his super GOAT role. People had put too much pressure on him. He's still only 37 there are plenty of HWs fighting who are his age. All the fighters that beat him, Werdum, Bigfoot and Hendo, are still fighting. And losing sometimes. What are his biggest wins? Sylvia? Nogueira? Cro Cop? They are still fighting too.