Just saw it yesterday and i have just one complaint about it.
First half of the movie moves VERY fast. We barely get 5 min in Draenor and it seems like they've cut out a lot of things out of the movie.
Also in the first half you get tossed between scenes that are barely 1 min long and even i as a little lore nerd had minor troubles following where
characters where going and why.
Otherwise it looked amazing, the story is mostly great and my favorite characters where Khadgar and Gul'dan.
I rate it 7/10, but i think it would be 6/10 if I wasn't such a huge fan.