I didn't have this performed at the dealer but did do it myself. (
HOW-TO LINK )
Out of any problems I've ever heard about the HCH I the most have been about the CVT. So far I've changed my fluid about every 18,000 miles with fluid specifically from the dealer. From what I've learned any other type of fluid (I'm a fanatic for synthetic) is too slick for the belts and will actually ruin the transmission over time from the belts slipping. I guess the fluid keeps the belts cool?
As far as it being like any other automatic tranmission fluid change it is MUCH easier. Drain & Refill. No filter to worry about. The easiest automatic transmission fluid I've ever changed.
Either doing it yourself or having the dealer perform the service just get it done soon! Do not let this MX item slide by, the sooner you have it done the better.