I have one.....got it to help with achy legs and it does work........just don't expect it to work over night, it takes a while to work up to full effect.
At first I turned it on and dialled up to where I could feel the tug on the back of my leg then the next week I put it up a bit higher and so on.
It has also helped with making my right foot more mobile, it was stiff after breaking my ankle both sides, making putting on boots in the winter almost impossible, but now I can put them on without the struggle........you can but try it, I'm glad I got mine for me it has been worth the money.......