I've been using my 920 now for a few weeks and my 2 cents here in Dallas, TX is that it seems to do a fine job. Traffic data is accurate, maps load quickly. The only complaint I have is the brief loading screen when it launches.
Not an apologist or ****** but this Windows phone 8 has been out for about 2 weeks folks, it works fine, give Nokia and Microsoft a little time to work out the kinks.
My only (snarky) comments to anybody is to the guy who was upset that when going to the Cleveland Browns stadium, to him I say two things:
1) I envisioned Forest Gump when the band has to tell Forest to stop running... I have to imagine the stadium is pretty darned big, you need to know that you've gone too far if you pass another road?
2) Why are you going to watch the Browns anyways?