This google map extension covers all my needs. It supports many preset styles to select, drag the necessary area to get easily the necessary coordinates, extended map-control, multiple layers like weather, traffic etc. and many possibilities to style the css.
Very stable and secure - I use this extension for about over 10 sites and never had any problems. Thanks a lot to the developers from JoomlaBamboo - the Joomla Club with the best support and amazing spirit!