I'm satisfied with mine, it works as advertised.
I have had the extreme cold issue with the 9v battery in mine as well, but only when using a battery that was at some degree of discharge. Read "extreme cold" as something less than zero degrees F. As a precautionary measure I'll start out a cold night with a fresh battery installed and a spare stored in an inside pocket. I try to carry the handheld in an inside pocket until I get set up.
Cold is hell on batteries.