I am using this climbing method with Treehopper steps and a better aider.The main two advantages I see with this bolt and aider system are 1) no need to drill the offhanded bolts (left side for me), and 2) you would only be drilling half as many holes. I need to try this out. It's a shame I don't have too many places where these are legal for me to use anymore, but in places where the landowner is cool with it, they are the preferred method for presets.