Perhaps a good way to compare the GV and the USG, is to think of the differences in complexity and advantages between an automatic trans, and a manual trans and apply them in kind. The GV uses planetary gears like an automatic, has hydraulics like an automatic, and friction surfaces that can wear out like an automatic. The USG is a good ol' gear box. Nothing fancy about it. However, you can power shift a GV (like an automatic does), where as you cannot with a USG. The USG can be used in 4X4, and consequently comes with the additional difficulties of installation (2 drive shaft mods and associated expense, possible cross member interference, fuel tank interference, and if you have a problem with it, extra work to remove it. The GV is by far easier to install and maintain. I agree that GV is not that parts friendly. It would be nice if they had someone like BTS out there, to give them a run for their service dollar, but they are the only game in town at the moment, and we all know what monopoly's are like. Reliable, but expensive.