I have the Mavic Open Pro CD's (CD=Ceramic)
The biggest diffrence between the stock dura ace pads and the cool stop greens (Chromium based for ceramic rims) is noise. with the stock DA pads, they were LOUD as hell and squealed like a pig. I switched to the greens and now they stop great. I haven't ridden in the rain yet (and I don't think I have in the past 5000 miles) so I can't be the biggest critic about their performance. One thing that I really liked about them is they are a dark grey instead of the machine surface so with a black wheel, black spokes and a black bike, they look really nice and don't stick out like a sore thumb like alot of black wheels with silver braking surfaces.