BodyMedia FIT Question

I just got my Bodymedia FIT device. It seems to be over estimating calories consumed, although this seems to be a common concern for people which most time it ends up be unfounded.

After reading about the 3 sensors built into it, one being the "galvanic skin response sensor " who's job is to measure the amount of sweat you generated.

This got me wondering if people who naturally sweat alot, like myself, would have as accurate of a measurement as one who doesn't.

Any thoughts?