Have one...LOVE IT!
I have the belt that I dont have to worry about asking someone for help to put the electrodes on my back. its like the belts home depot employees wear, but it has 4 electrodes in it.
LOVE IT! It has made the difference between doubling my meds, and just being able to get the spasms to stop.
Make sure if you are using it on your back, you ask your MD for the prescription for the belt.