sounds great

The sound is really, really good.
I have the Play 3 and I do like it a lot.
However, it should be noted that there is no audio input nor bluetooth connectivity which means this thing ONLY works over a wifi connection, the phone tells it what to play and it goes online and connects to whatever streaming music service or cloud player you choose and then it plays the selected tracks. That is a bit limiting and gets annoying at times. The bigger Play 5 does have an audio input plug which is way more convenient.
Id love a speaker that does what my sonos does plus bluetooth plus audio input connections, that would get 5 stars, this one gets only 3.
But it does sound really good.

skystormer about Sonos S1 Controller