Honestly one of the best card games I have ever played.  This comes from someone who has dabbled in Magic the Gathering since the 90s and has played a dozen different customizable card games over the last two decades.  The mechanics are solid and the quality of the cards is exceptional.  The only negative I have for the game is that the symbols and layouts of the cards is a bit poor making it difficult to quickly sort out a stack.  This is a minor annoyance for an otherwise amazing game (but still something I hope they fix in the future).