My doctor at the VA let me try it....I was pleasantly surprised as to how quickly and how effectively it seemed to work for me, in terms of how it make me feel good, and no drugs or edibles, just a battery operated stimulus. So that was a trial run and he has ordered one for me, I will get it probably in a few weeks for daily use. There is a little about this on Google. But I won't know how effective it is for actual sleep yet. Wish me luck.