I am with the group on stability on the tree, weight, and especially comfort. In addition to all that, I prefer a stand that has a higher seat. Most of them have the seats so low its an effort for an old dude to get stood up if you get caught sitting down (butt below knees).
By far, the most comfortable stand I ever sat in is the Millenium. I got them to make me one years ago with a seat that was higher than standard. I doubt if you could get them to do that now as I think their mfg is our of the Country. Not sure of that though.