I own the sitnclimb. Quiet, sturdy and very durable. Sometimes when starting to climb a very large tree its a little work getting it started the belt conforms to the tree and has some flex but.........thats a big plus overall. The belt design makes it almost impossible to slip!!! I've climbed trees that I wouldn't dare climb with most other brands. Thats not to say safety should be ignored, juststating that I have a lot of confidence using my Lone Wolf climber.