I'm going to Limnos/Λήμνος this summer for a two week vacation. The osm map pretty much sucked, but I've been using the Bing imagery now to fix that. There is still plenty to do using them and on the ground. Narrow roads in villages are pretty hard to see from the satellite images. But it looks very good already.

When I started the quality of both google and bing was very bad, but looks like bing has improved, google still thinks it's mostly deserted.