My opinion about the Google Maps + bundle Map2Geo + iGO:
1. Search for an address in Google Maps and transfer to iGO - great.
2. Building a route (A to B) in Google Maps and transferring to iGO - passable.
3. Building a complex route (A+B+C...) - no way
I think that the necessary routes can be collected from the waypoints transmitted from Google Maps and saved in iGO, without using Google Earth and PC...