Pros: looks good and the cables lay out nicely and the button layout is straight forward.

Cons: the usb ports are are 1.1 so using mass transfer devices with this kvm will take forever, and the audio switching portion only handles one set of speakers, so 5.1 or 7.1 wont work. And the cables do get pricey if you need all four

Other Thoughts: After two days it quit passing video through port 1

Pros: actually works, unlike many KVMs - I'm using two windows machines and a debian server.
Seperate switches for KVM and for USB, so you don't switch USB devices during data transfer. PS/2 input is mirrored on the USB output, so you can use PS/2 devices to control computers with no PS/2 ports (i.e. laptops). emulates PS/2 devices so my geriatric debian server actually boots correctly even if it's not selected. AC adapter is included. My custom key assignments on my multi-button Logitech mouse work fine through the USB (not true of all KVMs).

Cons: NO CABLES INCLUDED. Add at least $18/computer to your purchase price. Search newegg for SVUSB-6 or SVUSB-9 for 6- and 9-ft. cable options. No USB 2.0 support. Sometimes the keyboard fails to switch, but switching back and forth fixes it. The USB crashes my debian server when I switch away from it, but that's likely due to the fact that the mobo on it is ancient (had to buy a PCI card to support drives >60GB or so). Unplugged the USB from the server and it works fine.