Any harness is better than none at all. Some of the more expensive models are easier to put on/off & may be a little more comfortable. The harnesses that came with the Gorilla stands that I bought this season aren't too complicated to put on & they seem to be made well. However, the strap that tethers you to the tree isn't much over a foot long, so it doesn't offer much freedom of movement especially for an archer. So while this harness will work and will definitely keep you in your tree, I'd probably end up not using it as often as I should because it isn't comfortable while on stand.

In my opinion, you can't beat the Summit Seat-o-the-pants harness. Cabela's has the "fastback" harness for $40.

Summit Fastback

I know it's twice as much as the one you saw at Walmart, but you won't be disappointed.