I have a Garmin 390 sat nav' which is a few years old now and has the full maps of Europe installed. I have the 'lifetime updates' but don't update it as often as I should. As I'm going to Lake Garda on the tigger next year I thought I should plug it in to see what updates were available. Crikey, it took over 3 hours to update ! There were a massive amount of changes to the software of the unit and the maps updates. So, if you have not updated your sat nav' for a while I suggest you plug it in, it may take longer than you think...