I slept on this the first night and wasn't so sure, so went back to other pillows I had and I noticed how my shoulders and back ached in the morning. Tried this pillow again and wow, what a difference. I have other pillows that I had been trying for a long time, really good pillows. So I thought it might just be my mattress which is fairly new. Once I used this pillow again, all the aches and pains were gone. If you think it might be your mattress, try this pillow. I really did not want to write a good review as the pillow has already gone up in price since I first purchased it. So don't buy it, I don't want it to be sold out when I want another one.