Its really good.
I don't know if its because card battler games are not popular for some reason, or because of the "fail upwards" quirk of the game, but seeing this game at less then 4 stars makes me sad. It has nice animated scenes, the gameplay is fun and complex enough to be interesting but simple in its rules, like most good games, and its very forgiving if you play it long term.
Personally I also like the girl's body type, somewhat short with pale skin and medium size breasts are great.
Quite literally the only thing I can complain about is not having enough. It doesn't last long enough. I want more cards, more enemies, more scenes (sideways view doggy please), more store items, more difficulty and play modes. If there was a game that needed a big DLC, this one is it.
I don't know what else to say, please play it.