- atmospheric style (music and visuals), like an AAA game
- there is always something to discover, a new weapon, encounter, or the excitement to win a token with the help of the RNG God ;)
- various quests which need different cards and tactics
- the combat feels fluid, and it is challenging enough, with different weapon skills and powerups
- the stories and quests feel different and fresh, I feel like playing Witcher 3 somewhat (both in terms of combat - lots of evading ;) and in lore)

In overall, I recommend this game to everyone with an interest in RPG's. Even if your quests are confined to the card table, it is never the same twice, that's why it feels open.

And for an "indie" game, it is really polished and worth the 25 EUR price.
Also, the devs just added new content (a new companion, so not just skins) for free (December 2017), and Endless Mode is also coming!