I use them and like them. You do need to re-torque them the first 2 or 3 times after you ride. Once they settle in you are good to go.
Al
4321
Re-torque on all brands of exhaust gaskets is recommended. In the car business we use anything our supplier sends us when we order. They all will work if for that particular vehicle, if they don't we send em back and tell them to black list the part. Haven't black listed a part in over 2 or 3 years now.