Yes they are worth the money IMO and DEFF will help in the cold if u dont have cold wind blowing in around the bottom (keep it staked good)
I dont know but i always use it
I ALWAYS use it!!! i dont know fo sure if it "works" but im sure it helps (ESP while bowhunting)
Think apples right now they are a HUGE draw on our farm right now and its where all my cameras are set up...