It's awesome, very addictive. The cool part about it is that there are 9 classes, each class has their own class specific cards ie. rogues have rogue type cards (backstab, sap, etc) as well as common cards which can be used by all classes. As you play you acquire coins which are used to buy card packs which give you 5 random cards of varying rarities. You can of course pay real money for these packs however since the game is still in beta your card collection will be reset when beta ends so there isn't much point. It is definitely worth signing up for the beta. Hopefully you will get a beta key, they are highly sought after at the moment. I'm hoping that some eGO members are able to get keys so we can play together