Now that the winter is coming here to Finland, I use the seat and steering wheel heating almost every time. They keep me warm so I can lower the temperature setting of the climate control to around 16 C. Then the engine starts less often, saving gasoline, when it doesn't need to produce so much heat to warm up the air.
It feels a bit strange to me that the heated steering wheel doesn't remember the last setting, but the heated seats do. On the other hand, the steering wheel heating is easy to switch on again, as you can find the button on the steering wheel easily with your thumb, even without removing your eyes from the road.
Because the heated seats remember their setting, I need to check every time I start the car, if someone left the passenger heated seat on. But it's nice that I dont need to switch on my own heated seat every time, because it remembers the setting. So i'm not sure which way I prefer, remember the setting, or forget it.