I guess I will say that I also use the Seat-O-The-Pants that came with my Summit stand. It's very easy and comfortable to use. Only 2 negative points that I have about it:
1) If you use rain gear or a parka with a hood attached, the strap comes out of the side of the hood. Kind of a PITA.
2) The metal clip thingy that is used to connect to the tree strap is notoriously loud if it hits your stand. I dont' know about anybody else but mine always wants to get loose and bang into my stand when I'm setting up.
Other than that, its a great harness. I have even tested mine by purposely stepping off of my ladder stand about 5 feet up. Just wear tighty whities or you'll be singing in the choir.