I have a Zonet KVM3004 switch and it has worked superbly. No noticeable degredation in screen quality, the hot keys are easy to use.. no glitches.
There's one problem. The beep everytime I switch PC's. It is so annoying. The switch comes with the beep turned off and once you turn it on (using a hotkey) it can never be turned off again. The instructions didn't state this, so I didn't know I'd be making it permanent.
I am on the market for an affordable KVM unit (for 2 computers) that can disable beeping. Also, I use a different switch for audio because sometimes I want to keep the audio going on one machine while switching back and forth. This is especially handy when listening to mp3s on one machine.
Anyhow, does this IOGear KVM make noise?