Welcome, I don't have mine yet, and while I'm down here in Texas, they're on my build list. They aren't absurdly priced and while I won't need them most times of the year, those times that I do I'll be happy to have them.
If it were a £1000 option, I could see being a bit hesitant, but as a relatively mild priced add on it seems like one of those must haves.
I had heated seats in my volvo wagon, drivers side seat was in horrible shape, and the only replacement I could find didn't have the heated option. I figured "well I can do without that." little did I know. I'm probably a wuss, but me down here in Texas feeling that. I'd imagine you would be quite happy to have them there in Mass.