I am satisfied as long as there are full coverage of trees.
As for buildings, yes I need them, but I'd prefer quality over quantity. So I am very satisfied with New York DLC. I have compared it to Google Earth map. It's very true to life.
I have also compared Orbx's LOWI to Google Earth. It's not the exact replica of real life as NYC DLC, but the location of the buildings matches its real counter part. I guess they used OpenStreetMap data. I am fairly satisfied with that.