Garbage.. Don't waste your $$
I unfortunately pulled the trigger and paid the $80.00 for this app before really testing it. Thought I would 'get used to it' and learn to like it because I *REALLY WANTED* to view my map on my nice big in-dash screen. Nope. Utter crap. For fun, I put in a destination where I knew my route. It was routing me taking what would be the fasted route, but I purposely went off course and it tried to re-route me back to the mapped route the ENTIRE time, right up until I reached my destination. It wasn't smart enough to re-route as it went.
Now I drive around using my Google map app on my iphone, in a holder directly above my nice, big screen which lamely displays the radio channel and that is all.