So far, I have found the Apple Music Beta introduction to the Sonos controller to be very well done and not buggy. However, it does seem the integration lacks a serious feature... Apple Music (on all other platforms) has the Thumbs Up / Like button to signify that you like a specific track or album. This helps drive the Apple Music "For You" suggestions. It seems this feature has thus far been ignored on the Sonos integration.
Please consider adding this valuable part of the Apple Music ethos to the Sonos Controller before full roll out!