Review on Wagner QuickStop ZX934 Brake Pad Set with Semi-Metallic Composition by Jeremy Carpenter

According to the seller, they are quiet, dust-free and offer excellent grip when braking. But: 1- Immediately after installing my new QuickStop ZX934 brakes I had to inhale clouds of burnt brake odor every time I braked for almost 4 days. 2- Later, after 4 km of riding, my wheels start to change colors and for the first time a lot of dust started coming out of my brakes. Since installing these brakes my ZX934 wheels are now always darker than the others. 3- Even after driving 150 km with these brakes I still have no disc/pad clutch. Useless.