My constellation: A Windows 8.1 desktop and a Macbook Pro with Retina screen in a docking station of "Henge Docks". The USB switch operates reliably, even if only one of the two devices is on. As some other USB-Switch had problems and I have sent back this return. This USB switch comes super cope with the fact that sometimes both or only one of them is turned on. A switch of the second computer in the middle of operation of the first prepare the switch no problems. The "Remote" button is connected to a thinner cable to the switch and then the switch can conveniently hide somewhere in the background, Super. It is worth its price.