Have for Christmas my mother's Sitzheizkissen. Since then, there was a maximum of 3x in use. Why? According to the statement my mother's pillow slips when getting in and out getting away or increases with virtually out of the car. Somehow missing right mounting options. However, I must also confess that I do not know how you could do that with a universal seat cushion. Would love to give 2,5Sterne.