Google maps sucks :) compare the data to the OpenStreetMap!
http://tools.geofabrik.de/mc/#16/37.7801/-122.3926&num=2&mt0=mapnik&mt1=google-map
Do you know that OSM database contains more then 15k defibrillators?
https://taginfo.openstreetmap.org/tags/emergency=defibrillator#map
Do you know that every one can edit OSM like Wikipedia?