I only have experience of caliper brakes, v-brakes and recently disc brakes. I thought v-brakes were a massive improvement on anything that went before. Before v-brakes, brakes simply did not seem to work very well, especially in the wet. Maybe that was just the cheap bikes I used to ride. The shopkeeper in my LBS persuaded me to buy some disc brakes because he said they were less maintenance and wouldn't wear out the rims. He said it was difficult to get hold of 26" wheels with brake rims any more. They look great, but I'm not sure I need that extra stopping power. Also they seem to suffer from contamination. I've now been told not to lube the chain at the cassette, and to wipe clean the disc every week. The back disc still squeals like a pig, despite taking the pads out and sanding them. They are more of a faff to fettle, and what's more, there seems to be lots of different sizes and shapes of pads to get confused about when trying to get replacements. The front brake performs well, I would have to admit.