Picked it up when it first launched. Spent a lot of time with it, but ended up giving up on it due to a lack of direction in what the player should be trying to do. There is some kind of storyline going, but with how everything was left to the player to figure out it was hard to follow. Also it was open season on lower level players which made it difficult. The player vs player was unfair at best, you had maxed out users destroying the users just trying to level up to a decent enough range.
But I've been wanting to go back and give it another try, just been giving it some time to mature. Maybe I'll give it another go this weekend.