I was looking for its dual version a bit ago for work. Its nice when you can't change the video card... but its a very expensive way to do it.
you can buy two widescreen video cards for the same price as 3 3x4 + one of these. But you have the advantage of the center being in the middle.
I would personally love to get one at some point though. I wish they would change it around a bit though. I would like one of the video signals to be ported to a second cord on a switch, and one disabled on the same switch.
So, without changing the wiring, you can change it to a two monitor setup with the middle monitor as the primary and one of the others as the secondary. Not all programs/games work well with widescreen gaming... and if you can't disable it quickly / without changing cords, it would suck. The second monitor is also nice for many of those same games (so you can see your teamspeak settings ect)
LAST -
I wish there that game companies would change the rendering so that the left / right screen where looking a bit off to the left / right. So you can convert it to an enviornmental, instead of just a very wide screen.