App is decent at best – Sonos S1 Controller Review

The app is OK -- no better than that. But many controls such as setting an alarm, or adjusting the rooms, or finding the sleep timer, need to be simplified and made more intuitive. And the app aesthetics are poor. (This rates only the app, not the Sonos ecosystem as such, which is generally quite good, but is very, very fussy and temperamental working through ATT Uverse, the only provider available.)
Review by drjwr on Sonos S1 Controller.