In my opinion google maps are not suitable while travelling without a data connection. It needs to be online to get the information about where we are going. I Suggest here map is more accurate than google maps. I am using a windows phone and android tablet. In my windows phone the maps that can be downloaded offline and it is not necessary to connect the internet to get the location. But in the case of my tablet we just got the route map only as offline and connected to the internet.