Really good game. I am currently in Industrial age maxing out all my structures before moving to Global age. You don't have to pay any money to be successful and I don't even watch ads. I have never had the network issues so many people has been complaining about and I switched between multiple devices (mostly samsung phones). I would recommend the game also because it doesn't force you to play regularly, you can chose who you want to attack and can never get bullied by stronger players.