I’ve had this pillow for a few months. I got it to help relieve my severe neck pain. It has taken me time to accustom myself to this pillow, but it works. The larger side of the pillow works well for side-sleeping (for me), but I have instead tried to train myself to sleep on my back. This is supposed to be the best sleep position. I’m not an expert, so there’s that. The pillow has certainly helped with my neck pain when I sleep on my back. 

Hope that helps!