My friend from college was back for the summer this summer, and him and I would got together maybe a half dozen times and would play through one or two story mode maps, and then shadow battle it up, before moving on to whatever else (melee, wario ware, etc). It was fucking great. I can't say enough good things about FSA if you actually have someone else to play it with. That's not to say the single player is bad... I just never played it.