They are the second most comfortable that I've used, and probably the best made. They have a very solid feel, with a little bit of give and the leather soaks up sweat well, but they don't get all gross and slick like the inside of a wet pair of dock shoes. The collars are very tight and can be a challenge to install, not a bad thing, they don't slip but they are tough to get on the bar.
Ergons are cheeper and more comfortable.