i have had the QAD pro on my destroyer the last two years. i cant speak for any other rests but mine, but i do a 7 mile pack in elk hunt every year. camp elevation is at 10,500', hunting elevations range from 10,000' to 12,000' and temps have been anywhere from 70's to this past year of teens. My rest has never failed me and my equipment gets abused.....climbing on the rocks at timberline down to belly crawls in the grassy meadows at lower elevations, it has worked flawlessly. tuning was as simple as it gets and the containment speaks for itself.
last year it was cold and snowy for the whole week. never had a problem with the temps or the precipitation...worked awesome. i would buy it again. good luck in your search.