I also have one and I'm in love with it!! It has helped tremendously with back pain, leg cramps, and even headaches!
I slept with a maternity pillow the last few nights and have had no back pain at all since. it also helped with leg cramps and headaches. I swear by them! if you use them properly they are a life changer :)
I love mine! It's like a "c" shape so it goes under your neck along your body and between your legs for support. Very comfortable. Only thing that could be a pain is turning over with the pillow, but I found that I usually slept on my left side all night.
I have one and I am in love with it I feel alot more comfortable at night and I also find the ball helpful it elevates my legs up at night and helps with the pains I have!
I got one yesterday and its worth the money I slept so good with it