Worked great for the stretching exercises that my chiropractor prescribed for me for a pinched nerve in my neck. The NK1 allows you to put lots of pressure into your exercises. I tried a towel at first but it didn't work at all. This thing really works, but I had to dedicate to doing the exercises 4-5 times a day. In one week, my neck felt 95% better.
Buy it cuz it works!