It's not perfect, but he gets a lot of them. (IMHO.) The part that I thought was quite good was just seeing the way he walked and used his hands before you saw his face. I knew it was Kirk.You could tell it was Kirk, but my mother, a big shatner fan, was not sold on him being shatner. She says that some of his microexpressions are missing.
They're not ENTIRELY out of the uncanny valley. One issue is that he doesn't exactly match from shot to shot (especially in profile) the way a real person (even a real person who is not Shatner) does.