Summary: I bought a couple cheapie ones from e-bay and got tired of having to replace them after a while so I went looking for a decent one. I've had this for a couple months now and it is everything I've wanted in a KVM and more. Flicker free, can choose any combo of keyboard, mouse and monitor for each computer and is easy to set up. Excellent choice!
Summary: 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. The fact that the USB keyboard failed to work under BartPE was the final nail. I ended up returning the KVM and bought a Logitech G13 gameboard, which gives me the G-keys on one machine without all the hassles of this KVM.
Pros: 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. This was as expected. Mouse emulation disable feature worked and allowed Logitech MX Revolution to operate fine on mouse port. MX Rev also worked on generic USB ports.
Cons: 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. After hacking the driver to allow the correct native res, the video quality was poor. It looked like the graphics card was not actually setting the correct resolution, although it said it was. After ages of messing around, I found that for whateve...
Summary: Comments about Aten CS1734B 4-Port USB KVMP Switch: This switch came with all the necessary cables, works great and is high quality, not some cheapo. I was very pleased with the quality and the price. Some other switches that do the same thing were twice the price.