Very fast response for gaming. Overall build quality feels good. Wrist rest cannot be removed which may annoy some. Noise from key mechanisms sometimes resonates from keyboard case after each key press which can be annoying. Quality of keycaps (decals-) is average.
Overall, if you are after a wireless mechanical keyboard, this is pretty much it at the moment. Logitech Lightspeed lives up to the hype, I feel comfortable playing competitively with this keyboard.
If you want rgb/backlighting, removable wrist rest, more choice of switches, wired keyboard you may want to look elsewhere.