Good day Manuel. If you have an Android phone, try installing the DMD2 app on it to play around with it and get familiar with the app and its maps. This will help answer lots of your questions. The maps are OpenSource and you subscribe to them on a semi or annual basis to use on the tablet or Android phone. By trying the maps on an Android phone, you can see how accurate are the maps before investing in a tablet.
Best of luck,
Mike (Canadian in Ecuador)
