I downloaded and installed Maps 3.0 beta yesterday and everything went smoothly
I'm pleased that when I launch the app it doesn't remind me anymore that using maps can be expensive 'cause I'm not in my own network (in which I AM).
The graphics are much more nicer lookin' than before, and now I see all the nearby train stations etc.
And one of the best things is that when browsing the map and near by areas the map tells me how far I am from my current location (red dot). Nice feature to estimate distances
All in all, I'm pleased with the new version of Ovi Maps, great work from Nokia