A dealer won't install the Zspeed one under warranty - they can only install oem parts under warranty. Also, my dealer and corporate both told me that my CSC would not be covered even under the 60K miles powertrain warranty
That's not to say they won't cover it. Just that they told me in my situation it was extremely unlikely to be covered (because I don't spend a lot of $$$ on maintenance at the dealer). There are a variety of people who have gotten them replaced under warranty.