Anyone fitted a heated seat kit?

I know it's now the wrong time of the year to start thinking of this but I was wondering if anyone has ever fitted a heated seat kit to a motorcycle seat.

Kits can be found on eBay ect for around £30-50 with all wiring and switches. This came to mind yesterday when I had a go in one of my mates big-ass John Deere tractors and he flicked the switch without me knowing! Jesus that thing got hot! So I thought about how cool this could be for us commuters in the colder months along with the heated grips I thought it would make a decent combination.

Ryan