Well, I bought the app. Not because I'm ever going to ride a rally, but because I think it's cool. I plan to add a iPhone roadbook app to the phone as well. Then on the iPad the editor for the roadbook. This would make it so I don't have to own a GPS, other than the phone.
I know it won't help with locked gates and the like, but I can improvise.
I rode a lot of years with paper maps and by guess and by golly navigating. Not like I'm racing I plan to mostly explore.
Found a remote as well. That will be very useful on my bike. I use noise cancelling earplugs to listen to music and podcasts, it would be nice to be able to stop the music when some guy on a chopper is asking me if my bike isn't really too tall.