I view him as a player who can come in, and kill the boards in his limited minutes right away. I think he will be a threat in the pick and roll, and will get alot of garbage and hustle points. It is my understanding that his jumper game is still very raw, and I don't view him as being the next Rudy Gobert at rim defense.
But I think his toughness will help him be a slight positive on both ends of the floor right immediately. I'm not sold on his ability to guard the perimeter against faster 4s (Yes I know he is a center, but on defense we need someone to guard the perimeter, as Horford doesn't do it well at this stage.)
I view his floor as a hustle rebounder who struggles to finish against the elites of the league. And his defense as just a big body.
I view his ceiling as like a Steven Adams with a better jumper and better passing (and I mean maxed out ceiling here.)