I read Bowhunting Pressured Whiteails by John Eberhart andChris Eberhart. The authors swear by the Ambush Sling which is very similar. I have not used one, but everything else in the book is solid so I have no reason to believe that this device wouldn't be useful.

You can hunt from almost any tree.

It's quieter than a climber especially if you set your climbing spikes during winter/spring scouts.

You have more options on shooting directions.

The author says not to try it you're overweight.