[ZeroGravitas]

Cool project.

I'm somewhat surprised that they didn't end up using an Open Street Map derivitive. If Google was good enough, then they'd probably find something from Mapbox or others that use OSM data acceptable, and many provide tools so that "the additional work to custom style the maps would be extraordinary" wouldn't be true.

It's also a bit wierd that the comparison screenshots are all at a different level of zoom from the one's that he wanted to use. Many online maps emphasis different things at different levels.