I’ve always struggled to find the right pillow that doesn’t result in an achy neck in the morning. I’m a side sleeper and this is the best pillow I’ve ever used. I used to have to create a pile of two or three pillows to get to the right height and angle them all differently, but this is my all-in-one solution. The perfect height for me is with all of the foam inserts in so it lies flat. Absolutely no neck pain or discomfort after using this for over 2 weeks, which is a big deal for me. I will only ever buy buy Polysleep pillows for myself from now on.