Pros: 1. Good card game (interesting factions, card effects, innovative round system); 2. Easy to collect a deck for people who don't want to spend money; 3. Good mobile app (good performance on average smartphone, good interface). Cons: 1. Not all factions are equal in strength (but this tends to change from patch to patch); 2. Microtransactions are a bit expensive (at least for second- and third-world countries).