It's quite fun. Unlike traditional turn based card games where you have to be like "I lay x mana on this card to cast y ability" the game starts out with a given mana pool for you to choose your champion and monsters to fight. Once you hit battle it's all about the math of who put what where, who has the highest speed to go first, what modifiers do your cards have that could help you etc. And it all unfolds auto-magically.

I like it because more than anything, it respects my time. I don't have to sit down and have 30-60 minutes to spare in order to play one battle. Plus the game is cheap for a card game. $10 to unlock quests and $2 booster packs? You'll spend 3 times as much just to get your base deck in other games.