This product was recommended by my chiropractor for back and side sleepers. He believes we need support under the neck and lower back when sleeping on the back. I was waking up more and more often and couldn't get comfortable going back to sleep. This pillow has helped. (Note: the same chiropractor says that people tend to either love or hate this pillow and there doesn't seem to be much in between. It has worked for me.)For the price, it works for awhile IF you get your neck stretched over it correct, which, at the beginning is easy to do. There, it does the job it is suppose to do: align the spine correctly while you sleep so when you wake 90% or better is good! That's Great. That being said, however, the pillow loses its ability to hold the neck soon: within a few weeks at best. You can adjust it to pull the sides up around your neck, under your chin and it'll work, maybe 70%. Sleeping sideways, can be done, if you align your spine in the pit absolutely into the whole. Either way, one your back, or your spine, you MUST absolutely for the entire night sleep as still as possible straight, arms, palms down the whole time. I'm a 100% disabled veteran, and the VA should be picking up the tab for these prosthetics, and the VA chiropractor uses the product herself. It's not! It comes out of my own pocket, but THAT has nothing to do with the value and use of the product. MelChampion, SgtMgr., USMC (Ret-DAV) P.S. If a person would like to continue with this product they'd have to replace it, by my use, once a month.I was recenly diagnosed with Cervical bone spurs and this pillow was recommended by my doctor. I sleep on my side mostly and wanted something with side support. The first night the pillow was hard to adjust to and it seemed very firm compared to my other pillow. I woke up without neck pain for the first in months and now I find the pillow to be perfect for me. It is a little firm but that is what I need to sleep on and sleeping on the wrong pillow for so long caused problems, now I finally have this pillow to help correct it. Being a side sleeper I find this gives perfect support without blocking my vision. I even use it while laying on the couch watching movies. It does take a little getting used to but once you do, it gives amazing support and a nice stretched neck feeling when you wake up in the morning.I do like the pillow but I don't use it on my bed. With my condition I need soft support for the head as well and the middle of the pillow has little cushioning. I also find "firm" too hard to sleep on even in normal pillows. However it proved to be PERFECT for resting in my recliner. I can't explain exactly why it works so much better there but I rest my upper body into the center of the pillow and the outer edge gives support to my neck and head. I am happy it works there so well or I would have been disappointed.I have suffered from neck pain/spasms for many months, trying different solutions with no luck. Sleeping left me tossing and turning. I had tried the wave-shaped memory foam pillows before, but they were never comfortable to me. Thought I'd try this one, and so far I've been greatly pleased! The narrow chambers that your neck rests on are the right level of firmness, one is larger than the other so you can try each and determine which one is better for you. The sides are firm enough to cradle you if you roll over onto your side. I have experienced a more comfortable level of sleep since switching to this pillow (also verified by my FitBit sleep tracker). When I wake up in the morning, I have more range of motion in my neck than I have had in many months.This is my second purchase of this pillow. I have tried others but this one works best for me. It's very comfortable and doesn't need to be broken in! I had a car accident many years ago that gave me whiplash and i have some stenosis and disc issues. This pillow helps me sleep pain free!!Thanks for a great product! ?I suffer from chronic neck and shoulder pain and use a c-pap while sleeping. For these reasons sleep is difficult and often painful. This pillow is not perfect nor a miracle pillow however, i have spent hundreds and hundreds of dollars on pillows and this one is the best I have found so far. It also works well with a C-pap. It is not a miracle pillow I would have wanted but it is money well spent and it is greatly helping.I suffer from severe neck injuries - ruptured disks, bulging disks, arthritis, inflammation, and a curved cervical spine. I see a chiropractor three times a week just to keep things in check and from progressing further. I saw this pillow in my recommendations and decided to give it a try. The first few days were a little awkward but I have grown to really love this pillow. I flip it sideways and lay my neck on the big part while I am watching tv in bed. When I go to sleep I flip it back and it provides the perfect amount of support without over stretching my neck. I sleep both on my back and on my sides and I have worked out the sweet spots. Definitely recommend the pillow, just find the manner in which it works best for you!reduces cervical pain but with mild heaviness in headA really hopeless product. It increases the neck painprice was high. seller support not good.