At 6’8”, Sims reminded me a lot of Texas commit James Banks. He has long arms, and the lefty was tremendously active on the offensive glass. He mauled opponents for second chance points. Sims is an explosive "second jumper".
He uses quickness and athleticism to score the ball. This kid might not even know how good he can be yet. The sky is the limit. Defensively, his mobility allows him to defend against the ball screen while still being able to recover and deny shots. Sims is an elite athlete at the power forward position.