It's impressive but in practice, as a guide, it's very difficult to use. There is one path to follow with no overall map or routing to skip things. So to use

It's impressive but in practice, as a guide, it's very difficult to use. There is one path to follow with no overall map or routing to skip things. So to use it to figure out one tricky section often means reading 4 extra paragraphs just to find a landmark and trace from there to where you're stuck before you can follow along.