Dont knockem till you try em. Ive never used this particular harness but i did own a Anderson Tree Sling up until I lost it a couple of years ago. Very quick and quiet to setup. I used it almost exclusively in or near bedding areas. I loved the thing.
killed alot of deer using it. I felt more secure hunting out of it, than a regular tree stand. Of course when I first started hunting I would shimmy up a tree and stand or straddle a limb to hunt.
Im going to get me one of these Treesuits and I' ll let you know how it works.