From what I've played so far (two hours) it's a pretty solid game. Balanced first person shooter base, with tons of great RPG elements like classes, talent trees, a metric assload of equipment (guns, shields, accessories), experience, quests, etc. The cell shaded styling is also pretty damn cool, and lets them get away with pushing the intensity of the scenery without any lag.
Just wanted to see what other peoples thoughts on it were. I could see it being a bit grindy, but that's kind of the nature of RPG's (if you want them to be)