This is my first guitar in this price range and this is my impression after a few hours of play:
The build quality is good, the body and neck feels amazing. Very easy to play considering the fretboard is much bigger than a normal-scale guitar. I've seen some people say they don't like fanfret scale, but in my experience you can get used to it pretty quickly.
The fishman pickups are great. With push/pull on the tone and volume knob there is tons of possibilities to change the tone.
I had to turn down the gain of the amp, as the pickups are pretty aggressive. Great for Metal.
With the 27" on the low string you can go pretty crazy on the tuning. Drop G with the factory strings is no problem, below that i found thicker strings to work better.
All in all great guitar. Not much to complain about.
Side Note: The Guitar isn't actually 26.5" to 28" like it says in the description. It is 25.5" to 27" like the other variants of the KX507ms.