Like i said i have always worried too....i have not used one so far and have even sat in a blind of my dads, cold as could be, and there be one in the blind. I still refused to turn it on. But, as i stated my dad still always fills the freezer. Just hasn't put any big bone on the wall in about 5-6yrs. has gotten a couple of decent 3 year olds but nothing big.

But i do love this blind, i think i am going to try to get another. Not sure if you have used or seen the hub style blind. but, in my opinion they are much nicer than the spring ones. i have owned many of the spring ones when they first come out and they are lighter but, i think that is the only plus. this one i bought is for gunhunters, the window is to high for a compound bow. but, since a bad rearend collision ( i was sitting at a stop light and was hit by a guy doing 40) about 6 years ago I get a shooting pain down my arms all the time and am unable to use a compound any longer....last year was my first year with a crossbow and i would rather use a vertical bow anyday, If i could. i fought it as long as i could.