Installed a set of these rotors on the front of my 2002 Acura CL and they've been great so far. I've only ridden them a few hundred miles, but they're quiet and the slots seem to help the pads bite. I chose these rotors because the slots extend to the rim of the rotors and help to completely remove dust and water from the pad contact area. Haven't had time to test the rotor's durability in terms of warping, but will update if they need grinding (hopefully not soon) as I'm having braking issues. Note: These rotors seem to have helped me with my problem. Some aramid brake pads initially have poor stopping power when wet and cold. If you have a similar problem I would recommend these rotors.