I switched to these pads to use with my carbon Zipp rims when I got Ciamillo GSL (Campy format pad holders) brakes on a new bike.
Previously, I used Swissstop Yellow Kings on those rims. The Zipp corks stop the bike better, fade less when hot, pulse less, and leave no pulse-inducing and performance-degrading residue on the rims. So far, they've lasted 2,000 miles with plenty of apparent wear left.
It's more a compliment to the brakeset than the pads, but the screwless "slide out" Campy format makes cleaning or changing pads far easier than Shimano.
The lost fifth star is because they're just so darn expensive, even compared to Swissstops. But they seem like cheap insurance during a descent.
(Posted on 26/06/2011)