I got this because I had a sore and tense neck and upper back and can't afford regular massages. I was skeptical when I unpacked this because it didn't seem like anything special, and the color seemed duller than pictured.Looks are deceiving, so I tried it out right away. Reviews suggest that beginners start with their clothes on, but I hardly felt anything that way, so I went bare-back immediately. Different strokes for different folks! The initial feeling was a bit like a back scratch, like it felt good. After a few minutes, it started to burn, but in a good way. I found myself closing my eyes and relaxing. When I got up, I could definitely feel the difference!I have tried it both in bed and on the floor and both are effective, but especially on the floor. (That's what she said?) I've even caught my cat resting on it. :PIt came with a small manual with pictures of how this can work in other positions too, like sitting, or on your stomach, thighs, or feet. I haven't tried any of those, but if I do, I'll update :)