Things I liked: The gun itself feels very sturdy. I've had no problems with it so far, nothing has broken, I've had it for at least 7 months now. Mag is nice and heavy. Slide feels somewhat sturdy. Awesome hammer action.
Things I would have changed: Slide can be very hard to cock back, not so good for fast firing. Mag is very sensitive like said before. Hop-up isn't adjustable, at least I don't think.