Only for standard equipment

The device makes a high quality impression and working after also se once quite well.
A small downer on the desk is the fact that the ports are distributed around the unit and thus leave in 3 of 4 directions cable if you have connected because so many PCs. Also, the switch always starts with activated Port 1, regardless of whether it is occupied or not. Since I had, Port 3 + 4 is due to the accommodation to more reasonable to get to the selection button, I first had to change the port at each start-up of the computer.
We come to the main problem of the device:
Only supports standard equipment. My Logitech G15 was still working perfectly, but the associated control program crashed when changing the ports regularly.
The Razer Naga brought the switch even when connecting already crashed. There were then no more ports are selected and the mouse was no sound more of themselves. Only by restarting the KVMs (without a mouse) could be re-switching.
This circumstance makes the device unusable for my purposes.
Conclusion:
For use with keyboards / mice without macro keys or additional functions a very good device, otherwise unfortunately only partially or not at all usable.