Very happy with the under blanket overall. Good fit, heats up quickly and only really need it on for 15 minutes. Only niggle is the placement of the electrical cable on the under blanket, it is at the top near where the pillow is, but it doesn’t quite go under the pillow, unless the blanket is pulled up the bed so it isn’t quite to the bottom of the mattress.   Nonetheless I wouldn’t be without it now and sooo much better than a hot water bottle the costs mir to fill with boiling water from the kettle as having the blanket on.