309 Series is the best
I’ve tried several compounds over the years, and after living with these for a while I won’t use anything else. As stated in the description they’re not for everyone as they lean more towards track level pads than streets. One thing to note is if you live in winter climates be aware they are a little “soft” that first pedal press on real cold mornings, it still surprises me but the pad comes to life pretty quick. They last a very long time, aren’t super aggressive on the rotors, and best of all they work.