Well end of next month I will have a year on my 835M HVAC. Really no issues to speak of, but?
With this be a first year for the AC, I am leaning toward purchasing the extended. I believe the extra 2 years would take care of any problems that might occur with the new model. You never know.
I've read so many pro and con positions on extended warranties, that in the end I guess it is your own personal feelings about it. It feels kind of nice if you have a problem, give the dealer a call and it will be fixed (my dealer picks up and delivers at no charge).