Not used a set of cantis since about 1994, but recently built up a cross bike with them on. Spend hours trying to set them up (rims cleaned also), but just couldn't get even a hint of power. Eventually took them to the lbs, the chap thought I'd done an ok job but said he'd tune them a bit and perhaps to try new pads.
Get it back, still utterly useless although in fairness the chap at the shop told me he'd barely got any additional power out of them but they may bed in. How on earth do folks race on them, they barely slow the bike down at all, and I'm comparing to my road calipers, not my formula disks? When things got wet it was downright dangerous.
Brakes, are on one froglegs. Are the brakes at fault, or is that just the way cantilevers are? Was told to swap to Mini Vs, are they significantly better? From looking at the pics of crossers on here it appears the choice is either disks or cantis?