I've seen a lot of reviews of these tyres and they have been pretty shocking. I think this is partly down to people running the wrong pressures. The Kawasaki manual recommends 32psi front and 36psi rear. Running these pressures the tyres are shocking, to the point of not wanting to ride at all. However I emailed bridgestone and they told me the pressures I should be running. This has transformed the bike beyond belief. Lots of grip wet or dry, and I'm looking to hopefully get 5500 miles out of them. I wouldn't get them again as I want to try roadsmarts, but if I bought a new bike and 021s were fitted I'd leave them on.