I have three cycle cross bike that I built up with canti's, the one I've adapted for touring. I had Shimano R550 canti brakes on all them which have always worked fine, that is until recently, when I took another stab again at mini-V's using ProMax mini V's on the one. The jury is still out as to whether these newer mini v's really show any improvement in "stopping power" over a well set up canti's. There is a difference in feel and modulation where some might prefer one over the other but truthfully, both get the job done adequately with KS salmons.