They're ultra stiff with a very smooth motion. My only gripe is with the funky single air valve which provides pressure equalization between legs. The thing is just waiting to get nuked by some trail debris.
As soon as I get around to it I hope to find individual air valves for each leg that will fit the existing threads.
MBA reviews of the Crosstrac from '93 and '94 here if interested.
"...if 4130 were discovered tomorrow, it would be hailed as the greatest building material in the history of mankind." - Keith Bontrager