Since I rarely see any reviews on this, here is a fast one :
The only current m9/92 airsoft replica on the same level of the new Marui m9a1 (and maybe the new we clones?)
Mostly full metal (apart the outer barrel), solid build
Heavy recoil for a airsoft weapon,
About 330-350 fps out of the box.
Effective range vs human sized targets around 75-100 with default hop-up (can go up to 150 with the RATech/Volante up hops)
KSC gas system appears to be superior to others on the market, since the gun has been working quite decently in coldy Ireland
Now the less positive aspects:
not compatible with standard TM ckoned mags
Less upgrades available (compared with TMs)