Basically I found this to be an expensive waste of time, especially since all I wanted was the G-key functionality of the Logitech G15 keyboard to work on one machine. 2 days later I had that, but at the expense of an unreliable video setup.
Well built unit, comes with cables; Logitech G15 functioned as expected - full functionality only when plugged into a generic USB hub port; On generic port, G-keys and LCD worked, hotkey switching did not; On keyboard port, hotkey switching/OSD worked, but G-keys and LCD did not.
Didn't pass EDID information through to PC correctly, so graphics chipset couldn't identify correct monitor resolution; The special "DynaSync" feature, where the KVM is supposed to clone the monitor EDID, didn't work for me.