I just had a chance to watch a few of his highlight clips, and the only issue at all I have with him is, as others have mentioned, his shooting mechanics are a little wonky. It's not just that he starts the ball low, it's that the ball tends to start directly in front of his face so he tends to swing the ball up and around from left to right, which reeeeeally slows down his release and could screw up his shooting motion. I'm typically in the camp of "repetition over form - see Martin, Kevin" so I'm not overly worried about it, but I could definitely see his mechanics being an issue that needs to be addressed down the road. Mainly because against aggressive close outs at the next level, it's going to make it a lot harder to get his shot off on kick outs, for instance.
But man, what an explosive athlete. Not only does he have a quick first step, but he's so rangy that it only takes him a couple steps to get to the rim after he beats his defender.
And hell, why not? Decided to write something up: http://.com/orange-hoops-hoping-to-land-kobi-simmons/