I changed to the AP 355 conversion and tried the DS 2500 and DS 3000 pads, Both gave some problems and we went for Padgets, which I'm still using. Lots of noise though when they aren't really hot. On track we found that we needed to add some ducting due to temp but now we are back down to 600deg they are awsome. Very good feel, and very progressive.
If you have the money then get them, they are so worth it.