i have installed it. had it on for about two months now. it flexes better then the aal and shackel lift so i'm happy. i've taklen it off road many times and never had any issues that i can remember. on road it is just as good as off, handels real well, and dosen't ride near as rough as some people i have read claim. the only thing i've noticed is that now tthat i put my hard top on i geta little of rubbing on the flares, but that's nothing compared to some of the other trucks i've driven.
for the price, $375 with shipping, i'm very happy.