I am going to be in Italy for 4 weeks and would like to have GPS. I have a Samsumg Galaxy S5 but will not have a data plan over there. I've read a little bit about using my Google Maps app and offline maps but I'm not sure I really understand that. The cheapest stand-alone GPS unit I found with European maps is $150, which seems a little steep for a one-time (albeit 4 week) use. Does anyone have any suggestions? I'm not quite technically illiterate but I'm not a geek either so please keep your suggestions somewhat simple. Thanks so much in advance for the help.