Originally Posted by Hoosier Red
I noticed a plateau about a year after using it and went back in for a recalcitration of sorts. They kept everything the same. Then last April I did it again and they adjusted the machine from 8 to 15.
As for noticing if it "works." I've always found that it works in that I don't exactly feel re-energized when I sleep with it, but I feel like a zombie if I sleep without it.
Yes, you said it all so much better.