For the record, here's what I like and don't like about Len in his video vs. Noel. This is the DX link I gave before:
http://www.draftexpress.com/article/Nerlens-Noel-Alex-Len-Head-to-Head-Matchup-Video-Analysis-4289
These entries go by the timer on the YouTube video, not the game clock. I don't discuss every play.
0:49 Len is in great position after an offensive rebound, but can't figure out how to clear space or draw contact.
1:03 Len pops out way too far after setting a pick, then has no one between himself and the basket, yet settles for a mfugly jump shot that's about four feet off the mark.
1:29 Len easily beat off the dribble when Noel goes left.
1:40 This is a good catch. The first time I looked at it, I thought Len traveled, but now I think it was a good play.
1:57 After a screen, Len is wide open at the rim, but he instantly takes himself out of the lane and sets up too far from the basket. Then on the catch, he pivots even further from the basket. Decent move after that, but I doubt he would have made the shot if not fouled.
2:45 This happens a couple of times in the video. At the end of the play, notice that Len has no lift at all for his second jump. After contesting Noel's shot, he's glued to the floor hoping that a teammate can get the rebound.
3:37 Len does well to get the ball in good position, but then backs off against a tiny guard and can't finish.
3:58 It's stupid to have Len show on a pick-and-roll 25 feet from the basket, but I'll put that one on the coaching.
4:25 Len leaves his feet to bite on a routine fake on a foul-line jump shot and should have been called for a foul.
4:58 Again Len gets no lift on his second jump when battling for the offensive rebound.
5:21 Good decisive move.
5:55 Again Len rolls unnecessarily far from the basket.
6:25 This is similar to 1:40, with Noel trying to front Len on the right block. Len beat it both times, making somewhat difficult catches. It looks like he has good hands.
8:16 Pretty good help defense.
8:31 Again Len fails to take advantage of a clear path to the basket, and instead settles for an ugly-looking short jump shot. He was fouled this time, but it should have been a dunk.
In summary, this is what I see:
* relatively mobile but lacks lateral quickness
* good hands
* good defensive awareness
* adequate footwork and balance
* shies away from contact on the offensive end
* poor leaping ability and virtually no second jump
* not much explosion in general
* tends to wander too far from the basket on both ends, especially on offense
* no instinct for attacking the rim