There's no way in hell you can be up a tree in a saddle quicker than me putting my Summit Goliah on tree in probably 2 minutes or less.As far as freedom of movement doesn't that work against being still so you don't get busted by a deer?I'm open minded about new hunting techniques but common sense tells me this doesn't pass the smell test.I see the advantage of climbing a variety of trees and thsts about it.
I feel like the freedom of movement allows you to always obstruct the deer's view. If you needed to, you could rotate and always keep the tree in-between you and the deer. I use to think the same way about the quickness of the set up, but after using it, I would disagree with you. You may not be as quick with it at first, but once you figure out your setup, it is way quicker/easier in my opinion.