I've been using one of these
, and have no complaints. There's also a cheaper 2-port version of it.
I don't game any more, but I'm a bit of a user interface Nazi (see: mechanical keyboards
) and would've probably noticed (and been pissed off by) any increase in mouse/keyboard lag. I'm guessing that the USB connection is essentially a direct pass-through, and the switch just snoops the data as it flies past to detect the hotkey sequences to switch the ports.
If the world isn't making sense to you, you're either drinking too much or not drinking enough.