I purchased a set from r1concepts off e-bay about a week now and I have to say they are working great. The package was 4 rotors, both front and back, and all 8 pads. I had them installed on Saturday and they have shown to have more stopping power then the OEM. At first they did have some weird sound when braking but now they seem to have set in and I can barely hear them. I took my car to the interstate and tried a few emergency stops without any cars around and I noticed that they stopped much faster and I had more control while braking. I am really pleased with my purchase and would recommend them to anyone that is going to MOD their Nata for more speed and performance.