I used it almost without fail daily for 7 years! (Where's my prize?)
I am very sensitive to the Epstein-Barr virus and I was living amongst the latinos who are almost all infected with it. So to not get CFS again I just used it every day to be sure.
Also I wanted to use it more than any of my customers so that I could be sure I was selling them something that won't harm them. Now that I'm "old" (52) I feel that using higher frequencies for myself is safer for the blood, so I use either 10 hertz or 40 hertz daily (since again I am in latino-land).