Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Does this pillow help one that sleeps on their back?
Document: I have a few of these. I have problems laying flat back, so I alternate between 180 and 90 degree rotations to add some life. I also like this in the small of my back help back pain.I's also consider getting a few more.
I have back and neck problems and need a supportive pillow to help with proper spinal alignment and this pillow easily fits the bill. It is well made, and firmly stuffed, washable, and comes with a shaped pillow case. I still insert the pillow inside the shaped pillow case into my bed set cases with ease. Highly recommend for anyone looking for a pillow to help ease neck and/or spinal issues.
I've had back/neck/shoulder pains for many months and have spent hundreds of dollars on all kinds of different pillows. Then I came across this one  and thought I should give this shape a try. I love it. I wake up pain free for the first time in a very long time. It fits into my normal pillow case covers which are softer than the rosebud print cover it comes with and the pillow doesn't smell. I'm buying a second one just in case they stop making it. I'm a side sleeper.
I'm (was) firm to my massages and chiropractor at least once a week until I started shopping for pillows. I must've picked like 5, this one being one of the 5. I was doubting a pillow will fix my neck/back problem. Read many reviews so I decided to go with the cheapest one that had the highest rating in case I would be disappointed with the functionality and price. And I'm glad I did. I now sleep a lot better. I haven't visited my chiropractor in about 2 months and my neck feels great!
This is a great little pillow. You can scoot one side of it around the back of your neck to kind of support your back a little bit when lying on your side. It supports the neck really well. Definitely for side-sleepers. The pillow case fits nicely and comes off easily for washing.Follow-up 7/3/2014:  I liked the first one so well, I bought a 2nd one in January of this year and had it delivered to my folks' home for my periodic visits. The 2nd one wasn't as nice as the first one - it is very hard and it hurts my head & neck.
My wife injured her back/neck and can't sleep through the night. Her Orthopedic doctor provided her first pillow 4 years ago. It is a necessity and great aid.
I liked the shape of pillow. I found it too hard for my liking. Needs less stuffing. I put it between my legs to ease back pain and RLS.
I'm always searching for the perfect pillow, mostly due to neck problems, but this one isn't it. Its too bulky and the fabric and filler are just not comfortable.
I've slept on this for 2 nights and am NOT disappointed. A little back ground - about 30 years ago, I was in a very bad car accident and have had to sleep on a cervical, cylindrical, pillow ever since. I have lost count how many I have bought, most were fine, some too hard or not enough support. Or were fine for a few months, then sank in the center, necessitating another purchase. But it was something that I HAD to have, or would wake up with a headache, if slept on a plain pillow without neck support.
just wanted to let people know that this has been great for my herniated cervical disc (c5-c6) and i'd definitely recommend trying it. i'd tried about 6 or 7 pillows before this one, orthopedic and otherwise, and had just prior resorted to sleeping on a stuffed beaver (not the real kind, the toy kind) because it was the only thing that lessened the pain i woke with in the morning. this pillow has helped me get to a point where i am not in pain when i wake up at all.
Answer: I sleep on my side and back. This pillow is flatter so when I am on my back, it doesn't hyperflex my neck. That used to give me a headache in the morning. I wake up headache free. I can't do without this pillow.