Took my truck out for a weekend camping trip in the mountains. I was reasonably impressed with its capability. Never needed to lock the diferential, but I didn't push it either. Only 5500 miles on it. The truck is totaly stock except for the rear-diff breather mod. Thinking of getting a brush guard. And a set of revos.
Check the video link:
http://www.huhwha.com/mov/offroad.mpg