So, the KVM appears to be not a total disaster. got a 2-port as well. When I first set it up the ghosting was so bad that my monitor couldn't autoconfigure, but some jiggering with the cables and monitor settings got it to acceptable parameters. It just so happens I had gold-plated monitor cables in reserve which fit the requirements of the new switch (M2M) and enough type-A USB connectors to get up and running. The gold-plated cables seem to produce visibly superior results to my old KVM, even though this is not such a well-reviewed one.
That's my theme for today: no total disasters. I think it's working out.
(By the way, did I mention that did a cool little case detail for me? I'll update with a photo later.)