That is a nifty utility.
Regardless, there will have to be big improvements from on line directions systems for me to switch from printing directions to my site on the web.
We get dramatically more utility in this fashion for the following reasons:
1. On line directions are not always accurate or easy. We are not the only ones to have found this. In our case we have excellent directions printed to our site from all areas (North, South, East, and West) (they are repetitive after a while)
Potential customers and customers have gotten lost using on line directions...and we have heard the same from some website/business owners.
2. More importantly, writing our own directions enables us to mention and reference town names on our site. ie North (towns A, B, C, and D.) South (towns E, F, G, and H) etc.
With reasonable optimization for the site topic we tend to show first for searches for those town names and the site/business topic.
While our site is optimized for the business service and 2 state names and a city name we add in excess of 10% of relevant traffic to the site for business service/town names. These convert.
When online maps and directions can match that value...and give good accurate directions I will switch.