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.
DS4 (EGS & loving it, so there!)