I've got one of those sitting in a drawer.
They're actually pretty cool. If your video card has dual output already, you can have four screens.
If you buy one, make sure that you have one of the cards on the compatibility list and not an upgraded version of any of the cards. I got an ATI FireMV 2250 to use with the TH2G because the 2200 was on the list, but the 2250 had something different about it so that I couldn't use it. Ended up buying a 2200.
The th2g is actually very easy to use and set up.
