I just finished watching the movie, its okay, not bad, not great, just OKAY.
That being said, I honestly I would have enjoyed it if it was more in depth, like two parts. I wanted more of a showdown between Twilight Sparkle and Sunset Shimmer. Maybe just a little longer Sunset could have had power, and later Twilight could have come back later with her own magic... but perhaps that would have just dragged out the story too long and loose audience attention. I think its a question of taste, but then again I haven't been around this franchise as long as some of the long time members here.
Lionchild