4 stars: So, the game is okay. There is a slight RPG aspect to every match considering the way they match you up is slightly unfair. But, the game is quite intense with strategy and luck. And if you just looking for a game to pass the time or to stack up characters, sure go ahead and download! With a major plus side, you can play a 2v2 more with anyone your friends with is with anyone in the clan that you decide to join.
5 stars: If your comment is you can't progress literally it's a game. I've made three different accounts on three different devices and got them all up to champion arena. It's just a time based game and losing trophies and falling is required to get your cards up to a higher level cause they don't want you leaving the arena till you have higher level cards. It's how the skill matchmaking is based, off the level of cards
5 stars: Best mobile game ever. It becomes more difficult over time, but that's the whole point of the game. Despite being a free game, there are no ads and paying money for the game is optional. Very smooth gameplay and rarely lags. All event challenges are free to play and some allow you to keep going no matter how many times you lose.
5 stars: Loving the game. Played it for 5 years now. They are listening to feedback from players and try to make it as fun as possible and to progress in reasonable times. It's a pay to win but still fun. Also at some point in the game (and for some challenges) it's only skills and not anymore pay ...