When he’s healthy and motivated, he can be excellent. He’s mobile enough to keep pace with guards on defense, he can protect the rim and rebound, and he’ll run the floor and get all kinds of garbage points on offense. He’s also 22 years old, and he’s spent the past few years stuck in a nightmare situation in Philly. 

There’s a chance that he’s better than anyone realizes. At worst, he’s Bismack Biyombo. His best case scenario is probably close to Thibs-era Joakim Noah: 

http://www.si.com/nba/2016/12/13/nerlens-noel-trade-destinations-76ers-trail-blazers-warriors-raptors