I bought one a few years ago after my Cabelas Tat'r vest somehow was lost when I moved houses. The Tenzing is a quality vest, but I wish I'd have stuck with the Tat'r. The Tat'r had a strong magnet that actually the seat folded up against the vest while you were walking. The Tenzing magnet isn't strong enough to keep the seat up, so it hits your legs while you're walking. I'm also fairly thin (6'1'' 175 lbs), and I can't get the Tenzing as snug as I'd like.
In sum, it's a good vest, but I'd go a different route if I were purchasing another one.