Map library for gwt

I recently have been working with a hobby project where I want to show a map and create an overlay(path) on the map. I also want to change the overlay of the map in runtime. To do this I´ve discovered these options, but only found one of them to be working for my purposes:

The Official Google gwt-google-apis maps version

the good

• It works
• Its the official thing, meaning that most of the functionality in google maps is supported
• probably works on any version of the gwt

the bad

• Its version 1.1 of the maps api, the latest version is 3. So you get an old look and feel on the map
• You need an api key
• Displaying several maps at once seems to be a problem

gwt-google-maps-v3

the good

• works very well
• version 3

the bad:

• not official, not everything works
• DOES NOT WORK ON LATEST GWT version!!!

gwt-maps3

the good

• simple to use
• version 3
• works on any known gwt version

the bad

• advanced functionality is not implemented yet

For me, the winner is gwt-maps3. It has the features I need(markers, polygon, polyline etc) and it works with the latest gwt version.