Second purchase for the spare room. First was a double dual controlled blanket. Single controller this time as a smaller double bed and used by single occupant usually. Tested it and heats fast, toasty warm on no 2 setting. Box for wires rather low down below pillow can be felt under sheet, not a problem with single occupant but might be uncomfortable if two in bed? Probably have to move up to under pillow rather than right down end of foot end if two people staying.