Two of my team mates field this gun. This is all just my opinions and experiences with it. Ill start with a pro - con list.
Pro
AMAZING externals. Just....airsoftgasmic.
Good performance out of the box
Quiet. Not the quietest, but still has a satisfying pop when fired. Very crisp.
Heavy. Satisfying heavy, not painfully heavy.
Great crane stock battery compartment design.
Cons:
Price (for me)
Piston (been known to be problematic, dont know first hand)
Heavy, but like I said, satisfyingly heavy.
I've heard it can have wiring issues, but haven't experienced it first hand
Did I mention the externals are something otherworldly? It's as if Jesus himself fashioned this rifle from sunshine warmth, Katy Perry's loins, and angel hugs. Like most VFC rifles, it's remarkable.
Now the big down. We have 2 guys like I said that run these. One had an issue where the trigger would lock up. Like, you physically couldn't pull it. After playing with the fire selector for a few minutes, it would be fine again. I don't know if he's still having this issue, as he is lazy and doesn't play much anymore. Jerk.
The other, was flawless for probably 5k rounds or so. We had many backwoods field games and it always performed admirably. And hurt. A lot. One day out of the blue he pulled the trigger and something stripped BAD. grinding gears, gun won't fire. I suspect it's the suspect piston I've read about, but who knows. It's going back to umarex if he ever gets off his equally lazy butt. If they won't warranty it, we will just swap out whatever stripped with a better part.
All in all, I'd buy it. Depends on your comfort level with opening her up if it needs some TLC. in both cases I'm convinced the fix would have been easy and fairly inexpensive.