If you never got a chance to play Me and My Katamari this is a perfect opportunity to do so since EB Games/Gamestop just lowered the price to $20 in store.
The game currently has a 75 metacritic score and IGN said "Its small stage design, propensity for backtracking, and obvious slowdown and camera issues certainly keep it from being one of the premier PSP titles -- but that doesn't mean it isn't fun."
However, you can't really go wrong with spending only $20 on a solid PSP title. If you have no idea what the game is about check this out and it will explain everything to you.
[Via Cheapassgamer - Registration required]