I think he'll be one of the steals of the draft. I put more weight on actual accomplishments than most. He was pretty clearly the best player in NCAA basketball last year, and backed it up in the tournament. That doesn't guarantee anything, but most really good players show it in college. In the final four against Kentucky and Duke, he won the battles against big men everyone says are better than him. Those games weren't outliers either. This guy is a winner.
I like Zeller and Olynyk, but he's got a more competitive mindset than either of those two, and he's better at dealing with physical play. His skills fit where the pro game is going, and will likely make an all-star game or two in his career.