Crisis Core: Final Fantasy VII may not be for everybody. It's a fairly shallow action RPG (though the Materia Fusion system adds a bit of depth) with simple gameplay and very little challenge. However, the missions can get really addictive and the combat is fun. For fans of FF7, this is a great game, flaws or not. The story is interesting if you've played the original game, though some things kind of bothered me. How the hell can I buy items from online shops and maintain an e-mail account in this game while I couldn't in Final Fantasy VII? Maybe it has something to do with Zack's SOLDIER status, but it just sometimes seems like technology is more advanced in this game than in the "future" one.
Ah, nevermind. If you're not a fan of FF7 or have never played the original game, I still recommend you give Crisis Core a try. In terms of gameplay, it's nothing like FF7. Don't forget, it's a prequel to FF7, so newcomers are welcome. Just don't expect to pick up and enjoy FF7 after playing this graphical beauty of a game.