Hi!
I own a Roam SL, which I am generally very happy with - except for one detail.
Unaware of the Sonos ecosystem concept, I bought it because I needed a new bluetooth speaker, and it had good reviews and a good size for what I needed it for.
Unlike any other bluetooth speaker I have/had, the Roam does not automatically attempt to connect to the last device it was connected to when powered on; my JBL Go (which died) did it, JBL Go 2 (also dead, replaced by the Roam) did it and my Yamaha THR10-II does it, and it is such a convenient feature.
As covered in this forum post, this has been requested before.
So, it would be wonderful if the Roam could do this as well.
Cheers!