I liked the game a lot. However, it has almost no replay value. I replayed it a second time months later when I forgot exactly how things progressed, and it was significantly less interesting the second time (and I replay Phoenix Wright games and still enjoy them).

That said, the game was really good. All of the characters were well-done, the sketchy animations were great, and the story was interesting. Just don't spoil yourself before you play it.

EDIT: I forgot, some puzzles use the DS in pretty clever ways, as well. The puzzles were also well-done.