Body Bug or Heart Rate monitor?

[mefordis]

Does anyone have any experience with the Body Bugg or Heart Rate monitors that track your calories burned? I hear the Bugg isn't really accurate but there are heart rate monitors that are accurate with calories burned.

Also, with the heart rate monitors, do you have to wear a strap to your chest every day like some I've seen. I don't think I'd like that.

Can anyone share their experiences?

Thanks!