I just finished seeing the movie with my friend, since he got a copy with the subtitles. I'm not gonna spoil it for ya, but all I can say is that it's EXTREMELY loyal to the games, and that it's probably the best video game movie adaption yet.
For those of you who don't know about it/what it is, it's a Nintendo DS series. This is the trailer for the movie version...
[English Sub] Phoenix Wright: Ace Attorney - Trailer - YouTube
Go and see it. It's so awesome.