I have a couple of these for the PS2 and GameCube. They really helped me get past some tough levels, etc. I recommend it as a last resort if you're trying to unlock everything and either can't do it or just wanna save time. Sometimes you can find character models and secret characters not otherwise found otherwise. Action Replay, Game Genie and Xploder are awesome. Sadly, you can only get them for downloading game saves now, and you can't use proper cheat codes anymore.