My wife and I bought this blanket and it worked great out of the box.  After a few months it would heat less and less, we kept turning the controllers higher.  The next fall it would not heat up at all.  We bought another of the same blanket for the next year.  again, it worked great out of the box but by spring would barely heat at all, even on the highest setting.  This fall we will look for another brand.  We are done with Sunbeam!