Ive thought about looking into these before, but i really dont think i have the exact application for them. They seem good to me, but i do worry about mobilitiy, so i would defiantly want to product test it before i purchased one (try it on), and i see they come in different sizes, so i would try to find one thats not so bulky yet still maunuverable. I also dont want to look like a lollipop when im in a tree. I usually wear layers but i like things like wool, down and pirmloft, things that pack well and i dont need as much. And when i have my down suit on under my wool i have sat on hillside with whipping winds on top of mountain in wyoming while its snowing and stayed fairly warm, granted the idea of extra warmth on my feet is very appealing. Granted hunting whitetails way up north this could be fairly awesome, id buy the Heater suit simply cause its quieter and made in america.