Replaced stock Trek FX 7.3 pads with these Salmon pads and cartridges. The original pads were shredding aluminum off my rims and making a hell of a racket. These have been on for 1500 miles now and are still quiet (unless the trail is really dusty) and firm stopping. Some people comment they work better in the rain, but I can't tell as I stay indoors in the wet myself.
Run these on my commuter/ cyclocross /road bike. Tekro 720 cantilevers. The stock hard black pads were getting shards of aluminum embedded in them. They work great. They do require a lot of toe in on cantis or they will be noisy. I ride these in rain, mud, dust etc... I do clean my rim sidewalls frequently, to remove any buildup. Have also had these on for 50 mph descents with no problems.