Anyone that has owned a Duet knows the grief. SONOS is a superior product by leaps and bounds compared to Logitech solutions.
Strange. I owned a Duet (and still own the Controller) and had no big issues.
I now have a Touch in my main system, a SB3 in my second system, a SB Radio and the Controller that works with them all whether synced or playing separately. It handles my 47,000 plus song library without hassle.
While I've had no big issues, I know of no product ever made that has a 100% satisfaction rate. A quick visit to the Sonos forums showed people have a number of wireless connectivity issues, problems adding music, crossfade and muting issues, firewall issues, missing libraries and so on.
In other words, it sounds a lot like the same problems one sees on the Slimdevices forum.
My apologies for not having the problems you expect me to have. Guess I'll have to work a little harder on screwing things up. ;-)