Hi guys
Thanks for all your answers. Finally I was so unhappy with this SONY stuff, especially with the handling, that I sold my CMT-MX700Ni and the SA-NS300.
It was so unconvinient to simply choose or change an internet radio station, and it took so long everytime to change the station. Also the connection to the station seemed to be lost often. The unstable connection with the SA-NS300 I don't even want to mention.
With the SONY iPhone App I was not able to really control the stuff, I had endless discussions with the guy from the support, but he did not even understand that this app is not very useful like this...
Now I have the SONOS, I can't believe how easy it can be. One minute for the whole setup, the choice of internet radio stations is a real pleasure, the control of everything is that easy and smooth simply using my iPhone.
Very sad, I always was a SONY fan, but this time it looks like they did not care too much for this product.