I had to buy a wireless keyboard since my cat kept biting the cable and keycaps to my previous keyboard. The NJ80 has been amazing so far!
1) There is no input lag for the 2.4G -> typing and playing CSGO works.
2) It sounds amazing stock! While it is my first keyboard, I am super happy with how that Flamingo switches sound and the quality of the keycaps. I replaced the keycaps to switch up the color, but the stocks were solid.
Shipping was faster than expected, super happy I didn't order from drop.