I've got salmon Kool Stop pads on one Dahon bike which are quite new and so far they show no signs of living up to the hype. I've got some Clarks pads on another bike that are excellent (unexpectedly). Looking through older forum threads it used to be the case that those in the know always recommended Brompton users to upgrade the brake pads to Kool Stop, but I'm wondering if that's still the case since Fibrax pads came as standard? Given that my experience with Kool Stop hasn't been overwhelming I'm thinking the Fibrax pads may well be better (I have a pre-2008 Brompton and haven't changed the crappy stock pads yet).