If you have a laptop and few usb outputs + you are confused about the accuracy of the cursor (graphics / layout / games) + there is a need to program keys - this mouse is a must buy category Got pros: - work on bt without the need for usb receivers - appearance - pleasant to the touch, ergonomic keys - quick switching of the scroll wheel operation mode - indication and setting in Logitech Options - holds a charge for a long time, charges quickly Got cons: - quite easily soiled: you need to either wipe or wash your hands all the time before use