The Bang That Blew Your Buck AWAY!!
I gave this game a 10 because of its overall value-to-cost ratio and the fact that I play this game about 10 times more than I thought I would. However, there are some (minor) flaws. If a song is not in MP3 form, it will not work (to my knowledge). Maybe a future update will fix that problem. Also, sometimes, during a user-added song, the song will pause for the briefest moment as the game's beat recognition software creates more obstacles and analyzes the song (but it's literally less than a second). Lastly, there's is subtle lag occassionally, which usually leads to missing the "perfect" zone for a button mash, but you'll usually get "excellent" in its place.
All in all, you will likely NEVER find another game that starts at $5, brand new, and is so fun and jampacked with content. A MUST BUY FOR PSP OWNERS.