Very useful but with caveats
Just used the free version during our two week road trip through Italy. It worked great for the most part. However, be mindful of the route found. In a few occasions, we were led down roads that are very narrow or with gates that prevented proceeding with the route. It also failed to find some addresses we tried to reach; but I got around the issue by finding the location on the map, dropping a pin and routing to that location. Despite issues, very thankful for the app.
Italywander about
Navmii Offline GPS Italy