the only 2 problems I found with them are:
a) somewhat too close to bike. To have both legs straight, you squeeze the seat. Either leg straight requires touching the engine. Side pressure on knee, hot, leg tends to fall outwards so you can't totally relax unless you put the ankle over the peg and let the knee fall outward. The pegs also go out straight, this means away from perpendicular with the leg, i.e. the boot slides out with bumps.
The solution would probably be to bend them out 5-10 degrees at the top.
b) the adjustment (shear) pin breaks easily (fortunately) but it's annoying to repair at every fall. I made a bag of spare pins but the design could be smarter and capable of folding and returning. In fact, I wish they were just simply a pull-out-to-adjust type of thing, I would move them completely out of the way (120 degrees up or back) while dirt riding.