I love this thing. I bought one for my Mom at Christmas because she has chronic neck/shoulder pain and migraines. She loved it so much, she raved to my sister across the country, so then I bought another one for my sister. Who refuses to be baited by her husband when he calls her an old lady for wearing it. 
Then right before I could buy one for myself, they were gone! Glad to see they’re back, I’m getting another one!