So to give a little report, I've been using my seat, and its great.
Being late April its not too cold just yet. (will be coldest in June/July/Aug)
This morning's ride to work (https://goo.gl/maps/mGjF6o8M4R72
) it was showing 10 Deg Celsius on my dashboard. (this temp will get down to 2-5 C in the coming months)
So I had the seat on high power, but after about 10 mins had to turn it to low power, just gets soooo hot under your bum. But the heater does extend toward the very front of the seat, so having your legs forward while sitting, also heats up the top part of your legs.
Comfort wise, it seems to have a little thicker padding than the standard seat. But I found the standard seat comfortable