Got mine yesterday and am very glad I bought one during the Woot! off. As another commenter says, those 3 AAA batteries can put out a lot of juice. One of the 8 modes reminds me of how it feels to back up to a jet in a hot tub. Anyone who wanted this and waited too long or stayed on the fence, if it comes up again at Woot!, don’t hesitate. (It seems that Amazon has replacement pads, and it also seems that the set of pads the unit comes with should last a pretty long time.)
It’s a pretty awesome little machine. For the price, it’s really made very well.
I only wish that the pads were on leads that you didn’t have to attach to the back brace, that way I could use on my legs, etc.