I have a summit viper and really enjoy it. Have killed 10 deer out of it. Very comfortable and use it for both gun and bow. Quiet. My only problem is falling asleep in it.
Used a tree lounge twice. It seemed to be the sturdiest stand I ever had been in but a little more trouble to put on a tree.
Most of my hunting partners use the old man climbing treestands. I have had touble with them but eveyone I know who has them love them. They fold nice and flat for carrying. I would say find some stores that will let you try them out to see how you like them.