I picked up my pre-ordered Serenata last week just in time for a ski trip.
It was a great to see that the phone was happy at -15 celsius (5 fahrenheit) and even after a few knocks and bumps the casing is completely unmarked. So unlike the Serene it appears that the phone can handle being out of the house. I traded my Serene with my local B&O dealer as the glass was very badly scratched with an imprint of the dials and the hinge was in poor condition, so I didn't have the heart to sell it privately.
The Serenata doesn't have the same wow factor as the Serene, but as a phone it is easier to use and as a music player it really is superb. Once you hold the Serenata you want one - as simple as that!!
The only down side I have found so far is that hand free conversations through the phone and speaker, rather than the headphones, is really not very clear for the person on the other end of the line.