4 stars: A good game, especially for free players; you can improve over time, and the amount of time you invest is up to you. The daily log in will give you gems over time. Having a long term plan will help you improve faster then others; it rewards good strategy. I would advise investing in your main characters over other cards myself.
5 stars: after playing this game for a couple of months, i definitely will keep playing. it is fun and very addictive. it is pay to win but its easy to get a decent deck after about a month, if you dont mind spending a little bit of money. the only thing i would add, is a way to know what combination of cards i have already researched to make it easier to build my deck
4 stars: Great game. However the only way to truly get anywhere and have a formidable deck is with gems. And although they offer free gems through the offerwall, it's still slog to get them and you have to do as many as you can which just takes up a lot of time. Even then, getting the best cards and upgrading them is a battle. But otherwise great concept, great mechanics.
4 stars: I wish they stuck to characters more. I get they have to give something up so, they gave up story. Wish you place your in any of stops on your side of the field. They way one card can't simply be overpowering. I do like the characters and easy rules to play. Overal a fun game. Edit: Simpsons would be a great addition to the game.
5 stars: I am not into the whole card battle games genera...