He's better than his rep on this site, IMO.
Having said that, he's a bit frustrating for me to watch. There's no reason that a guy with his quickness, length and athleticism shouldn't be able to get to the basket and finish there. He doesn't have a great handle, but it's good enough to beat a man on a two-bounce drive to the hoop. But he doesn't do that - rather than attacking the paint, he'll just use his quickness to move laterally and put up a jumper (which, to his credit, he makes at a better rate than most).
Even when he does go to the rim, he's never looking to challenge anybody. He's a solid player now, but IMO he'd be a much better offensive weapon if he forced the issue - get those layups or get fouled. I'd love to see him make a concerted effort to get to the line four or five times per game, because it's so, so difficult to be an efficient offensive weapon as a jumpshooter unless you're Kyle Korver.