the early stages, it's fine. But when you start upgrading, you get stuck. I have many mechs and weapons I need to upgrade, but it will take weeks and weeks before I get enough currency to upgrade 1... Or I can spend $100 and upgrade 2..... That aspect of the game is horrific. Whoever thought that was a good idea should be slapped. EDIT: I don't have to buy currency correct. But grinding for it isn't realistic. Plan on grinding it out for a few weeks to get one upgrade. Good game. Frustrating