Smart is rated highly, yet underrated. Until you really watch him, it's hard to appreciate how good his D is. It cemented it for me watching Exum match up against team USA at U19's. He abused good defenders like Elfrid Payton, and then Smart just suffocated him. Beat him to the spot on every drive. Got a great steal when Exum tried passing over his head, not a bad pass just incredible reflexes and hands. So many teams lean heavily on their PG for offense these days, I think he can have a huge impact on D.
He also has offensive upside. I think he'll be a solid slasher who gets to the line, an efficient 15 ppg scorer with average PG skills. He can be an all-star by making a bigger-than-expected improvement in his 3pt shot.