A lot of grinding when you start out, but progressively gets easier as you earn more money and upgrades. Multiplayer is fun too, but I don't know if I'll ever make it to winter with my team.
Was fun, but gets old now with all the modders. Also, you have to play liek 40hrs a week to earn enough in-game currency to buy the fun stuff. And I keep dying to bitches flying the oppressors.