YES!
I went for the Becker as it was offered free on my car (until June in the UK IIRC), and it has been faultless. You can even search for destinations via voice command by pressing a button on the steering wheel.
I paid for the historical traffic (£9.99) and on a journey I have been doing for a couple of months (Cheshire - Coventry) of about 90mins it has re-routed a couple of times and it has never taken me more than 80 mins.
I've also updated the maps - it took about 30 mins to download on a slow connection and about 25 mins to update the Becker box but this was for the whole of Europe so quite a lot of data.
After nearly 3 weeks with the Becker, I definately don't have any complaints.
One other thing - I liked the idea of the google integration with COMAND but then I realised that it's probably just as easy to do the seach on your smart phone - maybe a bit gimmicky??
I only have the basic Audio 20 (without 6 disc changer) so no media interface
, but it does have a 3.5mm aux in and a USB which is working with an 8gd USB stick. You also get album art (as has previously been mentioned). Navigation through the tracks is fine - via a standard folder structure and control wheel by the gear stick. Unfortuantely no Ipod playlists, but I think I can live with that!
If anyone wants pics / vids of this in action let me know.
Andy