The device runs with me for 6 months without problems. When unpacking initially I was puzzled whether the few interfaces. All signals to the two machines go only via one output jack. Very good. This saves space on the workbench. The device runs with me for a on a notebook under WinXP (workstation) and the other on different computers with different OS. Win2K, XP, Win7, Win8, OS 10.6.4, DSL, Knoppix. Everything easily. For switching times I can not comment because the switches at me are not time-critical. In any case, the change is not unpleasantly noticeable (I turn over the keys on the device.)