The movie was overall pretty good, nothing too special or out of the ordinary in those type of movies. I enjoyed how Twilight was able to reunite old friends and use that to stop Sunset Shimmer, even as cliche as it was overall.
Spike's role in the movie as almost emotional support for Twilight was done extremely well, and I commend the writers for making him one of the enduring parts of the whole movie. For once, I actually enjoyed everything Spike did. Bravo!
I think each mane 6 human counterpart was done well, with the exception of Applejack. Don't get me wrong, I think they did the character justice in design and how she acted, but she seemed to be the lone character in which the writer's didn't seem to know what to do with. She was just there for the sake of being there at points, and even though I'm not a huge AJ fan, I wish she could of had a more concrete role or presence. She didn't seem to have any sort of group she belonged to.
The ending seemed... random if anything, with Sunset Shimmer's transformation and all. I didn't really see the point in doing that when they did.
The songs were catchy and nicely done, and I especially enjoyed Pinkie Pie's human counterpart, and I'd say she was done the best, 2nd would be Fluttershy.
Overall, 7/10 for me.
And here is an extra clip from the movie.
http://www.youtube.com/watch?v=qN7uq3ABPOQ