Ranked in these QuestionsQuestion Ranking
Pro Offline functionality
You can download offline data per city or parts of cities if you live in an especially large city, but not for states or countries. Points of Interests are generally more relevant & current than the typical stand alone GPS unit.
Pro Navigation background change based on ambient light
This is great for night driving or even when going through tunnels as the map will be more visible for low light situations.
Pro Find your parked car
You save the location of your car and easily find it again
Pro Best execution of save location feature
Recent updates have made it so you can label a place instead of being stuck with some address or GPS coordinate and forgetting what it represents. Saved places show as stars and are all on one layer as long as you're logged in. There is also the ability to create maps (parallel to groups) for things you might not want to see or have show up all the time whenever you're using google maps from day to day.
This feature is highly helpful for planning, even if you're a person who likes to wing it.
Pro Accurate mapping
Pro Secondary routing
Google Maps can now search for and add a route for a second location on the way to the primary location that you are going to and have already routed. Note that it cannot do a third or true multi routing like the desktop webapp can.
Pro Most ubiquitous third party app integration
Asides from the stock Apple Maps app, Google Maps is the most commonly supported 3rd party map. 3rd party apps often have links for directions, Google Maps is usually an option whereas other 3rd party GPS apps are not.
Con Sometimes takes too long to load
Con Saved locations needs online connection and has no visible label
Two negatives about this feature is you have to be online to be able to save a place, but it is stored off line once google map gets on the net and syncs. The other negative is there is no visible label for saved places, you have to click on stars to see the label for them.
Con Maps saved offline can easily wipe your bandwidth cap via auto update
Google Maps offline maps update automatically in the background. Not a problem if you're using a sim card in your phone, but if you connect to a pre-paid hotspot that the phone recognizes and connects to as a wifi device you risk burning through your data allotment. The offline maps can be set to update manually, but this is not default behavior.