A spin-off of the main Phoenix Wright series, Ace Attorney Investigations places you in the shoes of Phoenix Wright's counterpart Miles Edgeworth to investigate and solve a number of mysteries. If you liked the Phoenix Wright series then by all means get this. If you didn't it won't change your mind.
Two criticisms come to mind when I play this which I think can be applied all of the series.
1) Doesn't really make use of DS touch screen features in investigation. What happened to using the microphone to blow away dust and using the touch screen to run tests?
2) No extras after you complete the game. Not even a picture gallery!
3) No real courtroom scenes
Still it is fun and the characters are just as loveable.