Avoid
Complete and utter waste of money. I did everything advised. I downloaded the maps beforehand, turned off WiFi and data. All I got was the intro, no driving instructions. Tried driving, nothing. Turned data back on, nothing. A couple of years ago I used a similar app for Route 66. It was plug & play. No faffing, it just worked. In the end we just used our Airbnb hosts instructions direct into Google Maps. Worked perfectly. TBH the apps Californian twang would sound stupid touring the Isle of Skye in Scotland. Surely a soft local accent isn't too hard to accomplish? Then again, in my experience they can't even get basics right. Avoid.
By Arthur