I have a severely broken leg and was facing possible amputation if I didnt do exactly what the doctor told me to do. The injury is painful in its own right, but the difficulty and pain of trying to keep my leg elevated and in one place using pillows, boxes with pillows on top or various configurations of items that were recommended by doctors, nurses, friends was almost impossible. Pillows slip , become compacted creating pressure and pain unless they are constantly re-fluffed. Inflatables werent the answer. This wedge is! The height cannot be adjusted, but moving it further or closer gives you differences in height . The illustration that shows a leg fitting the contours of the pillow is not realistic, one size cant fit all when dealing with the human body, but the same distance adjustment I mentioned above makes it fit, the foam takes over from there, no pressure created pain. The wedge stays in place really well, I am using it on flannel sheets, or is easy to move back into place if it starts to creep away. The cover has stayed perfectly in place on the wedge now for more than three weeks and the texture of the cover keeps my leg in place. The delivery was not as lightning fast as that for some of my other overstock purchases because the manufacture is on the other side of the country, but delivery was as quick as you would expect from a company that isnt overstock.