The set-up of the new ERA 100 was a bit of nightmare.  Wasn’t able to set them up in the location for which they were intended and had to swap them with a pair of my Sonos Ones.  Finally set-up and and placed in a different location.  Then the ERA 100s would not stay connected while all other SONOS products are rock solid inluding the Sonos Ones I moved to where the ERA 100s where supposed to go.  After a day and a half of playing ‘peek-a-boo’ with speakers, I go fed up and sent them back.  The ERA 100s are not ready for prime-time.  

The new app on iOS is no improvement either.  My music library disconnects intermittently too.  Solid on PC version, however.  Thank goodness.  

Sonos, you need to do more integration and regression testing with new products.  Very disappointed.