Pros: Well, it works exactly how I wanted. We already have a KVM switch. Just want to make it possible to share desktop occasionally. So for the person, I get the KVM connected to the main computer and the computer need to be shared. On the shared computer, I used usb key board. The splited video goes to a monitor and KVM.
Summary: After hours of tinkering (swapping out the graphics card, re-installing an image of my Win7-64-bit OS, etc.) I found that one old cable HAD to be use for one of the monitors in order to get both to work. Even then, the other cable had to be the "right" one - some cables would kill the image even when the magical cable was used for one of the monitors.
Pros: great image quality at 1920x1080; great price
Cons: both this and my Zonet splitter are super fussy about cables. I bought 2 new cables, one from NewEgg and one from on-line bidding, but neither worked. Either no image at all with an "out of range" error prompt (on my new Asus 1920x1080 monitors, or else only a maximum resolution of 1600x1200 (on my old 1920x1200 monitors).