One thing I have noticed on mine is that it has a little growl to it when the clutch engages and slips a little bit. The more I drive it the less it growls and it no longer growls between shifts. I've got about 350 mi on it so far. I suspect I could have surfaced my flywheel steel insert better. The insert was perfectly smooth with no wear pattern on it at all other than some coloration in spots, no galling though. I went over it with 400 gray sandpaper till it was nicely buffed off but I guess it wasn't enough. There is a resurfacing compound on the puck surface and thats what is probably causing the growl which is almost gone now. I'm supposed to race Saturday so I'm trying to get lots of stop and go driving on it before then.
On my old one 3 pucks fell off and got stuck between the flywheel and a couple of good pucks and I couldn't disengage it. I originally thought my slave cylinder went bad but when I found clutch material lying inside the bellhousing, I knew it was the clutch instead.