I have these shocks on my Pred. For MX they're OK. More and more drag racers are using these shocks for great reasons. One reason is weight, they are incredibly light, very comparable to Marvin Shaw.

Id use them over a Shaw simply for the convenience of adjusting the PSI in the shock to lower or raise the front end to get better launches. You'd set the PSI to the type of terrain. They shine thru the whoops and are great if you like to jump. They're awesome dune shocks.

I've owned these shocks for 2 years and I ride hard, no leaks.