I took the buck in the picture below while wearing the body heater suit!
It was damned cold that morning and I was warm as toast!!!!
Wish I had gotten one along time ago.......they do exactly what they say the will,easy to come out of and quiet......yes, they are big and bulky and thats what makes them easy to shrug off your sholders to take a shot.
They are a bit tricky to put on once in your stand but,well worth the effort......practice on the ground at home beforehand.
I enjoy hunting in cold weather much more now that I have one!