good tyres, a little on the soft side, and hence, i found that i chunk the rears if i do not round the edges a fair amount. they are good foamies though.
it's hard to say if they are the best, or not as i have found different rim stiffness to help in various situations. the kawaharra rims are not as flimsy and soft as the grp's so, at least they don't warp at just glancing a ripple strip.
i really like the Active rims, and find that the harder active rim (i think, im not sure though!) helps with the wear of the foam, as compared to the kawalahallalaas