+ does not require at least 1 device to be connected via a network cable (as required by Sonos)
+ slightly more stable connection to Spotify than Sonos. However, can not always be found via Spotify Connect. Unclear how to solve one but usually works if you do something else for a while and try again later.
- Not as good sound as Sonos' counterpart. Almost no bass at all.
- does not have the same playlist and queue functionality as Sonos.
The function with preset playlists works 1/3 times. Either you can not save the playlist, or you can not play from it (nothing happens when you select the playlist and select "play")
Took a while to install the speakers with the app. They lost power and got into trouble. But now that they have been running for a month or so, they have not bothered as much. Boring with first impression only.
Update after one year of use:
After six months, they started cracking and chopping. Customer service helped me fix this by turning down the quality of the stream from Spotify, felt more like an emergency solution but is not an audiophile so I can honestly say that I do not hear any difference other than that it stopped cracking / hacking.
After a year now, the three units I have start to end up in osync during play. Sometimes helps to, via the app, disconnect them from each other and then reconnect them, but it often comes back after a while again.
Have installed a new router with better range and speed but it has not helped. Could be Spotify's fault, but since hacking is also back, I do not think so.
Now I'm waiting for a speaker to come out with support for Qualcomm Allplay so the jacket replaces these when I'm tired of the hassle.