I haven't quite figured out what V-brakes have that cantilevers don't. Because of their long arms V-brakes require more cable travel than is provided by road levers, so an adapter is needed to account for it. And what do you get? Are they really as powerful, easy to adjust, and trouble-free as cantilevers? When you go to mini-v's, you gain some on the cable travel issue but lose on braking power (or so it appears to me). Also, V-brake pads are thinner so don't last as long.

The brakes that I have are extremely adjustable. They can be set so that the posts are all the way in for maximum stiffness and moved up or down the arm so that the pads contact the rim straight-on. This results in a brake that needs little or no toe-in to eliminate squealing. Spring tension can be fine-set (not like the 3 hole positions on standard cantilevers) so that they can be centered easily. I know that they're pricey at $125 per wheel, but as of now I'm (obviously) sold on them.