I have watchband leather and it has both heater and massage functions in driver and front passenger seats. Coming from Sydney, I thought I'd never use the heater, but I have used it often! The back massager (fairly rudimentary though it is) is also a comfort during long commutes and bad traffic.
Be careful with the heater roller-switch, though, as it can be easily knocked on (or left on) accidentally. I have had a couple of hot flushes because of this.
Welcome to the new members above, maybe the advice from Vexorg will get you a better response.
As far as the so called massage seats are concerned its one item on my DS4's that I would happily put in the bin - a complete waste of time and money as far as I am concerned and also add a lod of needless weight to the car. Other than that my current DS4 is brilliant!