In just three games with the Boston Celtics, Al Horford has already made it clear that he is going to be an impact player on both ends. He has been the best interior defender Brad Stevens has ever had at his disposal, and he has been an effective threat from all over the court. In fact, it feels as though any way Horford has chosen to attack works. He has been benefitting form open shots, but he has been doing even more with his ability to create in the paint.
Add on what Horford is doing as a passer and there really have been no glaring negatives in his game.