It's a great game if...
This game is deep, tough, and not for people who can't handle card games like pokemon, or Yu-Gi-Oh. Well the rules of the game are vast and different from any of the above mentioned, it still holds some ties to such. But if you looking for a game that makes "great" use of the eye toy from Sony, this is it. Sadly the game suffers from an easily cheatable card system. The eye uses the symbols on the cards to read what it is, but it can be photocopied in a certain way to copy cards. Sadly, online, you might run in and play with people who simply print off the best cards from the internet. It would be best to play at someones house where you can see his cards, or play with a trusted friend online. Not that copying cards will hurt pros at this game, but all in all it's just another thing for cowards to take part in, and thats never any true fun for the loyal players.
Many people say, that PS3 is lacking games but let me tell you this, from my experience with a FEW of PS3 games including EoJ, id rather have a hand full of super games then a bucket of slop.
Let's just finish this by saying It's a great game, if you "believe in the heart of the cards" and have the will, to learn the skills so id recommend renting it first to see if you got what it takes.