I don't know about others' experiences, but I am not upgrading to iOS 6 only because I don't want to deal with the new Apple Maps. I have it on my iPad, and in addition to missing large swaths of roads in my area (Metro DC), the traffic function - which I rely on in planning my commute - is a pitiful joke. Beyond that, Apple Maps is littered with locations of commercial establishments, while missing basic items such as mass transit stations. The final straw for me was a vacation in London. Apple Maps couldn't locate most addresses in central London, was incapable of finding any business in the country, and Apple Maps insisted that every city we visited outside of London didn't exist. IMO Apple should go back to Google for its iOS maps function.
Really? That's odd. I live in London and have only had a few problems there with names. I don't think I've ever had a problem with an address. And I've never had problems with locating cities outside of London either. I go to Uni in Nottingham and the standard maps has been fine. The only problem was the satellite image, which is fixed now. And, like with London, I had a few naming issues. But not with address and postcodes.
Example:
On my University Campus, one of the buildings seems to be named Nottingham Trent University, Clifton Campus. This is the campus for the University of Nottingham, a different Uni. So name issue. But, to test the issue, I typed in the postcode from Trent Uni Clifton Campus, and the right place comes up and has the same name.
That's just my experience anyway. A few places are named wrong or the business or building is placed in the wrong place. Experienced this in both Nottingham and London. But when I type the postcode, or address, no issue. Of course, we don't all have the same experiences. These naming issues do need to be fixed though, and then all is good! It looks like they might be focusing on satellite problems at the moment though, since the problems I have seen with this have been fixed, but no naming issues have...even though I reported them.