We have recently visited Ahmedabad for a two day trip and extensively used Google maps. It is one of the most useful app ever introduced by Google. It even features places to which even local people are not aware of. This app is very feature rich and very small in size.
One new update from this app by which we can save the map for a radius of 50 Kms is very nice. we saved the Ahmedabad city map prior to our visit and saved lots of data. Its voice command feature is awesome and worked well with GPS System of your phone.
Overall it is a very nice and handy app and it must be used by everyone travelling to any unknown place.