I've tried at least five different cushions over the past few years for my lower back pain while driving nothing really helped. I was skeptical about the ComfiLumba, but WOW what a difference. The wedge shape keeps my hips in a comfortable position and the cut-out relieves so much tailbone pressure. We just did a 6-hour drive to visit family, and for the first time, I wasn't squirming in my seat halfway there. My husband even noticed how much happier I was when we arrived!