I did mine 2 weeks ago, I have to check the slip but they replaced Master Cylinder only I believe. They did it in a matter of hours...
Was done under warranty...I tried explaining the CSC failure and what was happening to other people but to be honest I don't think that dealership see's many Z's, when I roll up I'm treated like a Celebrity, especially because its modded. So they had no idea but just said "hey, we'll fix it for free" so I said "Go ahead"
Working great, clutch doesn't come close to sticking to the floor