If you're open to another option I'll recommend Timbertall. I've hunted mine since 2003 or so. My main requirement was light weight & maneuverablity; I wanted to be able to roam easily and not really think about "do I carry it out or leave it in?"-constructed of aluminum it fits the bill. I've actually shot a deer with it on my back. Next was comfort and for me, it is. The adjustability while climbing, however, turned out to be an unexpected benefit but is what I appreciate the most.
I've tried a few others as well, but for me the timbertall is it.