PROS: These are the only aftermarket riser option I'm aware of, so I'm happy with them.
I've got short legs and these with the flo foot peg are 18 or 19 mm above stock peg height on my 2019 kx450, which feels amazing.
Going one spline up on the shifter lever was pretty darn close to stock orientation. (Where the shift lever is compared to a straight line from the top of the peg)
CONS: I think the bolts that attach riser should have cleats on the top of them. This way I'm not losing 4 cleats by putting the riser on. Although it seems fine while riding. Some of the black anodized coating came off of the flo foot peg using my 40° pressure washer head. (That doesn't happen to my rims...jus saying).