It was weird. Google Maps provided a great turn-by-turn navigation and search, but only if you were online. There were some methods to use it offline, but they were not really convenient, and it seems we’ve got finally what we needed:
Now you can download an area of the world to your phone, and the next time you find there’s no connectivity—whether it’s a country road or an underground parking garage—Google Maps will continue to work seamlessly
That’s a big win for users, and a big problem for companies that provided offline navigation apps on phones or dedicated GPS devices. TomTom, I’m looking at you.
Source: Google Lat Long: Navigate and search the real world … online or off