I've been playing this game for maybe a year now. I've spent more on this game than any mobile game I've played, by A LOT. I was enjoying the game until recently when completing higher zombie lairs resulted in far lesser chances of 5 star hero frags. It ruined the experience for me and truly made the game pay to win. I consider myself more of a casual player but I play every day and am in an alliance. I'm really close to just uninstalling the game and leaving for good.