Mary S., Cleveland, Ohio, U.S.A.: Dramatic first reaction
The first evening of wearing the harmony chip, I felt heat on the chip to the point I had to remove it and put it on another problem area.
Karma Singh, Kr. Celle: The Harmony evolution and inter-vertebral disk.
In 1981 I had a spine operation to remove a destroyed inter-vertebral disk. Since then, this has been a permanently weak spot with occasional severe pain. In November 2002 I put my Harmony evolution upon the operation scar. After just 36 hours all the discomfort had disappeared. Although I have never again used my Harmony evolution on this point, the discomfort has never returned.