I've been running the CFDF clutch now for over a year, and I've been nothing but happy with the results!
Bill McNeil has had the same clutch in his car for quite some time, and he's flogged it EXTREMELY hard in trying to work out a good launch with all the power he's putting to the pavement, and that clutch has held up quite well.
I believe he recently installed a SPEC flywheel, and possibly a new SPEC clutch to try out a new combination, so it will be interesting to see how he feels about the comparison between the two product lines.
Like most others have said here, I think that damage was much more likely due to driver error than poor quality or workmanship in the clutch.
Best regards,
Sean