I have been driving since then, and I overheated them a bit when it was hot outside. Now I have small vibration when I brake after 80km/h. The vibration increases as the rotors heat up. So I believe it's easier to overheat them in comparison to usual rotors. I don't think I feel significant brake performance with them, it is comparable to usual rotors as well. Perhaps, brakes are a bit sharper now, but it's not so significant. My personal opinion is that better to buy good usual rotors since they are cheaper and likely less prone to overheating.