Pretty good game, enough activities to keep you busy, ftp is truly valid and if you willing to pay, the cost is reasonable. The world battle design is quite unique, offering advantage to strong player but let low level ones have a chance as well. Also this is only game I remember you can get primary currency (diamond) by simply playing frequently. Why not 5 star? The game has balance issues. The WU camp is far far weaker than the other three, every hero in it is pure trash.