The logitech options and the other 2 services running in the background are constantly using CPU a lot, even when not in use. It takes 3% when not using the PC, to 10% of my CPU when doing anything, even with the keyboard turned off. I have the mxkeys keyboard. It's just a keyboard, it's not supposed to take away 10% of all the processing power, that's insane for a keyboard only! Comparing to similar services that's really bad. Other than that the keyboard is great, but I can't recommend it to anyone because of this software.