Has anyone used BodyMedia with PT clients?

When I was personally using it, along with my clients, it was called BodyBugg. I had three of them (got them through the old gym I worked at), and from my personal experience, the device is pretty accurate. when you downloaded the info onto the computer it would give you your calories expended throughout the times of the day, so you’d visually know when you were most active. The software also allow you to enter in your nutrition.

For it to be very effective, you’d have to wear it throughout the day, and even in your sleep (that’s what I did because I’m a fitness freak), but I’m sure my clients didn’t and most people wouldn’t either.