I have had the same problems with geocoding. Sometimes the pushpins are set on a place hundred kilometers away from the real place when the geocoding was made via postcode, city and street. But I consider this not to be a problem of the MP-data but of the algorithm to find the correct coordinates. So I wrote a tool which uses the FindAddressResults - function and corrects the results. The resulting coordinates are written in the database. Later, the import-wizard uses these coordinates.

In my example with 6000 customers I got pretty good results.

Rainer