Was at the Deer & Turkey Expo in Columbus, Ohio last weekend and was looking at a cheaper version of the "heater body suit" called a " warm bag". It's made by a co. called Staywoods. Does any body have one and do you like it? Or have you even heard of it? Their website is www.staywoods.com if you want to look at it. The guy claims it was tested in -6 degree F. temps and it stayed at 68 deg. inside. Just wondering if anybody has one.