After 7 or 8 track days I pulled these pads and some of the friction material had fallen off two of them. They were only about 50% worn but I don't want to use them more in case material keeps falling off!
That aside these are some very decent pads for the money. Good medium bite, good modulation, great braking power overall, easy on rotors, very slight and manageable fade at faster tracks.
Would also be good street pads, they don't require a lot of heat to work and they had no problem in the rain.