Everything besides the outer barrel is excellent. The slide has no slop (doesnt move when you shake the gun), magazine lock and blowback are both nice, no issues with slide getting stuck or safeties. But that outer barrel.. ugh. Plastic with an orange protrusion (thats not a removable tip that's part of the outer barrel), and it's not secured (it's free to wobble around with the slide back). This causes the accuracy to drop pretty badly when you shoot real fast. KWA does make a metal replacement for $20.
Hopup is alright, but requires that little tool to be modified and is proprietary. Accuracy is pretty good when you're not doing magdumps (that's that outer barrel issue). I really like the 21 rd double stack magazine, it gets about 2.5 mags per fill on a single stack reservoir and never jams even if your stack is terrible. Just wish they weren't $42 for spares (ouch!)
Overall this is a pretty good pistol if you want to upgrade from the budget KJW/WE but you balk at the price of a TM upgraded with metal parts. Some will say that this is a bad value for money because an upgraded KJW will outperform it at the same price. That's true, because this pistol dumps money into the externals and gas system. I don't need 200 ft of range on my sidearm, I just want it to shoot for a while and never break. And this is pretty nice.
Externals are very high quality besides the outer barrel
21 round double stacked single stack magazine
Excellent NS2 gas efficiency
Good enough performance for a pistol
Big accuracy drop when you spam the trigger
Cheap outer barrel design (KWA makes a replacement for $20)
Proprietary hard to upgrade hopup unit
Rating: [4 of 5 Stars!]