The component is great and is an excellent accelerator, but may I suggest two enhances to avoid always the need to clone it and customize it:
- expose in the marker structure the markerId that is generated inside the component
- expose client actions to at least create and delete markers in the map, not only by the Map inputs (this has a big downside since every time we want to change a marker and change the input list, internally all markers are deleted and recreated which causes a flick in all marks in the map when that happens)

Only used the single location map so far but with API key, lat and longitude it worked first time.