This has been a knock on him; he is big and strong, but doesn't necessarily use that to his advantage (offensively and defensively). I would agree with knuckle that his physical stature is solid - an NBA body right now - but he has some work to do on his technique in using his body to his best advantage. If so, he will be a force.
As it stands, it looks like his best offense is driving to the hoop while avoiding traffic and hitting outside shots. He should be able to do a lot more damage down low both with his shooting and on defense with bodying up guys and rebounding. Right now, it's mostly in his head and he needs to be more aggressive.