85%* of our customers report significant improvements in their sleep, back, hips and knees after the very first night of sleeping with the SleepAlign Leg Pillow. Please do not worry if this is not you! Everyone's body is different, so some people need a couple trial nights before getting used to sleeping with our pillow and to be able to feel the relief. This is exactly why our policy lasts 90 nights - to guarantee results, even if you need a couple nights to get used to your improved way of sleeping. *Results according to a survey done by 412 customers.