um, I can think of a few reasons to use it, its not for going to other lvls, just helps you cross a whole map at once, or so, and it works really good if you embed it with GM detect, like bottomy did here:
[Only registered and activated users can see links. Click Here To Register...]
Perhaps the biggest reason I use this is when I am attacking a monster off map, close to the edge, and I use a skill or accidentally walk over the edge, and I fall off into space......you either have to use a return scroll....or you can this hack...which puts you back on the map....so yeah....that's the best reason for it.
But very rarely do I use this ever.....I just put it on the trainer, because you just never know when you gonna need it.