Just returned from 2 weeks in Italy. Used this app to drive and walk in Rome, Tuscany, Florence and Venice.
An absolute must to get around. I knew about the vehicle mode but the pedestrian mode proved to be so useful to walk to tourist attractions, restaurants and find our way in little streets of Venice.
As for oversees charges, I kept the roaming data option off at all times. The app got a satellite lock no problems and no cell data was used.
Highly recommend.
DiscoCrisco about NAVIGON Europe, v2.4.2