These tires rock! I have put 30,000 miles on my GSX R1000 and have run full bores, michelins, pirellies, slicks and dunlops and almost all the miles put on are canyon or race track miles. Except for the slicks, these are the most confidence inspiring tires I have run. When I first mounted them and took it out for a ride, it felt very different, the profile of these tires makes the bike handle much differently than any other tire including slicks.
Straight line stability is much better than with other tires, it takes a little more effort to tip the bike in, but as soon as you lean it over the bike feels like it wants to fall to the inside. The initial input to start the turn is slightly higher, but once tipped in it is effortless to carve the turn. Grip is outstanding, even in the rain and feedback from both ends is fantastic.
On my first canyon ride I leaned it over farther than I ever was comfortable doing with my old tires through their entire life. I can't tell you much about durability yet, but I can say that for riding fast up a tight canyon, these are the best tires I have run yet. I love the way they make my bike handle in the twisties, they heat up fast too.