Well, nobody seems to want to answer so heres my experience..
I bought one without looking into it properly.
I run 1 X 24" @ 1920 X 1200
and 2 X 21" @ 1680 X 1050
Using 2 X Nvidia 8800GTX's
Without THTG Windows Desktop is great, native resolutions no issues.
I can even use SoftTH to run some games with no issues.
So... I plug in the THTG and realise, I have to unplug it again to reset my screen resolution to one supported by THTG, otherwise I get the lovely diag lines and cant see the screen, fair comment.
Using THTG under windows obviously wont let me run at native resolutions, it doesnt support 1680 X 1050 X 3 which would keep my desktop looking pretty normal.
Getting games to work, well theres a whole other problem.
Ive yet to find a way to easily plug in the THTG, load a game and play it in stereo widescreen.
SoftTH supports 5040 X 1050 no problems
THTG doesnt !
Using the supported widescreen resolutions available on the THTG digital edition produces fair results which look ok and perform ok, especially with SLI enabled, but its not an easy transition.
On most occassions I find it very difficult to get into the game to enable the widescreen profile without the screens going crazy or it crashing.
When I finally do, a few hours later it works very well, with decent framerates too.
Overall, I should have researched it more, it would also have been nice if the packaged cable was longer than a foot, which is barely enough to get it off the floor from behind your PC.
Personally... I think SoftTH has a lot more going for it, its just a shame about game support.
Now if I find an easy way to set up my system for THTG which allows me to swap back to my native 3 screen setup & back again when I please, then I may be happier.
But until then, the THTG is sat on a shelf and occassionally plugged in if I can be bothered to try and get it to work.
System :
Intel QX9650 Quad Extreme (Water Cooled)
OCZ 4GB RAM DDR2 800
2 X 8800 GTX
Vista X64 Ultimate
TrackIr & TripleHead2Go Digital