Will sound like a broken record here ... but I had never hunted from a "pop-up" type ground blind until about 5 seasons back. I figured too much trouble, would stand out like a sore thumb, scent would be difficult to manage, too cramped, etc. I have since become a believer. I used one that my cousin had set up in a thicket of 8-10 year old pines. Deer trails every where. Only a few semi-open areas in that planted pine plantation, none with shots more than 75-100 yards clear. First morning I sat in there I had gobs of deer, probably 50 different ones, walk within 5 to 75 yards from the blind. All sides. Never detected me one single time as far as I could tell. It was about 10F at daybreak and near dead clam. I had a small propane heater running wide open all morning. That same winter, I bought a cheap Tee-Pee looking one that worked OK but was very cramped. Two seasons back I bought a Double Bull and have used it a bunch of times. A bit heafty, but a snap to set up. I have killed deer, coyotes and turkey using that blind for cover. As I approach 65, I can see me using it more often !