OMG that's amazing. I probably saw the same article or ad that you did for that temperature control cover. I talked to my husband about it, and even went so far as to send him the link. There was a lot of info on the website, so we kind of stalled out at that point, and just kind of forgot about it... though that tab is still open on my browser to come back later.
I would have done the exact same thing as you if we had ever gotten around to deciding this would be a good idea. I just went and told DH about your post. His jaw dropped, as mine had. I said to DH, "Well, I guess I can close that tab on my browser!" He laughed and said, "Yeah, me too."
Someone really needs to tell them they are losing a crapload of money on this model with people who drop the purchase at checkout. At least, I hope they are.