The new Sonos S2 for iPhone and iPad is a complete retrograde step, stick with the old one if you can. I have had a Sonos system, 4 x Sonos 1, 1 x Sonos 3 and a Sonos sound bar for a number of years, without issue, however since upgrading the apps on my iphone and ipad, I have experienced serious connection issues, and frequently have to go to connect to the system using my Macbook Air in order to change station, or simply connect to the Sonos system. This is especially frustrating when I have to move from wherever I’m listening to the radio in the house, to the study in order to connect to and retune the system. This never happened with the old app.
Before I get the usual advice about reconnecting my Sonos system to my network, the Sonos system has been completely re-installed several times, currently set to hardwired from my master speaker to the main router, and my Wifi signal strength around my home is in the region of 50Mbytes. Plus the issues only began following the upgrade, not a very happy customer, and certainly less than impressed with the new app.