Who's the greatest NBA player of all-time will be a debate that will go on from generation to generation. From Wilt, the Big O, Kareem, MJ, Bird, Shaq, Lebron etc..It's just too difficult to say who is b/c the game is forever evolving w/superstars. I can honestly say I never saw Wilt play. I can only go by what I've read or from old highlights. But I've seen Shaq and he is good. It wouldn't be fair to draw any comparisons.