Gameplay-wise its a a great game , but everytime this game updates it gets worst and worst. Some of the robots and weapons literally takes millions of silver plus, close to 4 days just for them to reach to level 5 , so imagin how much grinding and time it will take for  them to reach their final level (which is 19 levels above level 5) and you know how micro-transactions get, if you want to reach the top, you'll have to take off you piggy bank cap.