The keys are sensitive and reactive to wish.
The sound of keys gene that my companion during my too few "hardcore gamer sessions" night ;-)
The backlight is very nice and not too aggressive for the eyes
Negative points;
you must know by heart the keyboard or you'll be forced to look for symbols that are not backlit
the Razer Synapse software made in akin to a keylogger
Conclusion: I recommend it despite its minor flaws.