I respect your take on this. Writing plugins is not always easy.
I will share, that I have installed this using a clean “vanilla” instance, (no other plugins), of WP 3.9.1 I have also tested what I am seeing in the plugin against the same address data in Google maps, and have seen differing results.
In all fairness, I have seen errors in Google Maps for addresses entered directly as well. We are located in Japan, but again, I have seen a direct difference using the plugin’s geolocation and direct into Google maps.
This is why I voted for an option to not use Google Maps in another thread, as many (actually I think all I have tested), other event plugins provide an option to do. In some areas of the world, this tech is not as accurate as others.
Thanks