Really helped my neck and back
I bought (& returned) a similar concept device a while back in a store and it was awful - too small and hard.  I hoped this would be better and it absolutely is.  It's not the softest (it's a very firm foam) but when you lie with it under your neck for a while, it does help the muscles.  My neck initially felt a little tender from leaning on it, but that wore off fast - and is probably why they advise building up from using it for 5 minutes at first and going up to 15 minutes once you are used to it.  It clearly says not meant for use over long periods and definitely not for sleeping.  I used it this morning before I got out of bed, when in addition to my neck (which always seems to be sore), my lower back was achy.  I was amazed that when I finished and got out of bed, my lower back had stopped aching and there was no strain in the process.  I definitely recommend this.  Added note - you can use this turned either way, I believe the first picture is the easier side to start on (it's what I used). Also it came with a black drawstring storage bag to keep it clean.
Rating: 5 stars