Bought this for hubs! He's a side sleeper and sometimes gets a sore back during the night.I had previously bought him a knee pillow, which he loves and says it really helps his back. But, he forgets to bring it to bed and then falls asleep without it.This "pregnancy" pillow has replaced his regular head pillow and knee pillow as it stays on the bed all the time. It is the right height for good neck support while side sleeping and perfect between the knees for helping with back pain. He rarely flips over onto his back but when he does the pillow is still comfortable for his neck.Five stars!