I have a (black) Lumia 920 for about a week now. I love the form factor and most of the OS. For instance the keyboard is excellent (I'm comparing to my HTC Desire HD) and I like the guessing of words I want to type in text messaging and email. I already used the Nokia Drive navigation app and it worked satifactorily. I haven't missed any Android apps, but have missed the easy way my address book was inegrated with my phone. Adding contacts, using telephone numbers from emails, etc was easier in Android. Typing part of a number to find contacts with same string of numbers is missed. Also it doesn't make sense that when searching for a contact in the phone app it without being specified otherwise only searches in contacts recently called instead of the whole contact list. The Android notification center and the way it could be used to go to the notifications made a lot of sense.
All my antennas seem to be of better quality than those on my HTC. With the same (now cut up) sim card I have better internet connection in buildings and the GPS antenna gets a signal in the whole of the car instead of only under the front windscreen. Call quality is good and hands free volume is indeed excellent.
I did already have the proximity sensor malfunctioning (triggered without cause) which prevented me hanging up when calling. Blowing on it to remove dust(?) did the trick.
All in all a mixture of seemingly excellent build quality with software that needs some improvement and the one error.