centerforce clutch problem

I installed the centerforce DF clutch in my car and right from backing it out of the bay it had a noticable chatter. I only changed it to get away from the exteme pedal pressure of the finger type that was in it, it had no chatter and had 1400 hard, very hard miles on it. The center force chattered so friggin bad that I couldnt even imagine trying to take off on a hill where I would need to slip it a little. I called them and they went over all the obvious BS that I knew they would pick out and then said to send it back for inspection. It went out UPS to them today, I sure hope they step up and send me a good one this time. I have bought their products in the past and never a problem. Anyone else ever experience this, and did you have any luck getting them to admit fault of product?