For me, I had to inflate the pillow quite a bit, as anything less, would still allow me to roll over on to my back. Once that was done, the product does work as advertised. It keeps me from rolling on to my back. I bought the pillow for a reason other than snoring. My doctor gave me a sleep test for my sleep apnea problem. It was determined, that when I sleep on my back, there was a greater number of problems recorded on the sleep monitor. By forcing me to sleep on my side, the number of problems was reduced. As the apnea condition can be very serious if not treated properly , I guess ninety dollars is not that much money after all.
MICHAEL