This product was very exciting with few caveats (reason why 4 and not 5).I used it in a plane for a 15 hours flight, combined with the lumbar support. Periodically would have to inflate / deflate but all good. Great was when we were on the tour on the bus, and the road was so incredibly bumpy (like nothing I've ever seen) and this became my companion. Took everywhere with me. First you feel kinda goofy with it but once you start using it quite honestly I just didn't care (care more about my comfort lol).So I was happy with it. The caveat: on the plane I kept sliding on my seat so had to re-adjust a couple times. Wish the bottom of the cushion was made of a material that would not slide.