This is a great little puzzler. A cracking conversion of a long running series. The PSP version has lots of additions, many of them very challenging. See-saw mode is insane!!
Also with over 800 (I think) puzzles spread across standard & Ghost modes this is going to last a single player ages. If you're lucky enough to have someone to play against then add another Star onto the score. I know from past experience on the Playstation that this can be an insanely addictive multiplayer game.
My one criticism would be levelled at the attack formations of some of the characters. Some of them are just unfair with far too many rainbow / wooden blocks being fired across the screen. Far too often this makes VS. modes a little one sided.
I enjoyed this far more than the PSP exclusive Lumines and while not as much fun or as original as Puzzle Quest this doesn't frustrate by being overly bugged.
If you're after a puzzle game you won't go wrong with this one.