old iRO player here, got dragged here by my GF; I generally hated trying pservs in the past, but Nova's been pretty decent. Exp boosted enough that it's not utterly mindless grinding, but still a challenge to get cards and gear. I don't know anything about guild comp since I haven't maxed a char yet, and in pvm, MOST builds are viable. AR is really bad and barely has effect. RE: cash shop... it's on par with iROs, and that's all I'm gonna say about it.