The first clutch that i had was a Clutch Master stage 4. It was a four puck, sprung clutch, but I forgot the composit material. I loved it, here is my review:
The negative: When I first got the clutch my car was stock...14b set @ 16psi and cat back exhaust. I had some clutch chattering when starting to engage the clutch in first gear.
The positive: By the time my clutch went it was roughly 20,000 miles later. I had a big 16g set @ 16 psi, full turbo back exhaust and built motor. There was NOT ONE day i didn't beat on the car. The clutch felt firmer then stock, almost no chattering ( I think that I got use to it or it was naturally wear and tear) by 2,000 or 3,000 miles into it. When the clutch finally went it was slipping so I had time to change it before the car left me on the side of the road. I don't know if this is true for all ACT clutch packages but when my friengs clutch went, IT WENT FAST, almost 2 days!
The best advice that I will give you is DO THE PROPER BREAK IN PERIOD! 400 to 500 miles break in! This is crutial for the life of the clutch because you basically want to "mate" the clutch material to the flywheel surface.
Also, it depends on what kind of driving you do and here is a quick breakdown to help.
I would recommend sprung clutch full face disc for daily driving. Longer life closest to stock feeling and should be good for additional slightly modded car
unsprung/ sprung 4 puck. The grabbing power will be awesome with the 4 puck expect some chattering good for "slipping" during launches. This is good for cars that are around doubling their HP
Twin disc/ 3 puck unsprung for drag car. Expect harsh engagement with the 3 puck and hold as much hp that you can through at it
Hope my $0.02 helps you out, good luck.