It does not interact with Sonos groups, you have to faux the groups.
The app allows you to create a master, and then slaves. You can 'mirror' volumes or have them go up by the same relative amount (-+10 or what I move the slider not mirror it) more like the Sonos app does it. This brings a "Sonos like" interface into a HE dashboard. Normally with a HE tile you can only control one Sonos device volume, not many.
@Cobra has plan to make it parent/child, but not sure if that has been done/release yet. It's been a few days since I checked.
I use it to control the volume of all the my Sonos devices via the dash tile in HE. I also added in 2 (of 8) extra 'zones' that I like 'independent' controller over. The top slider "Virtual Sonos" controls all zones by relative increase and then the others you see.
EDIT: That video is old and does not show the relative increase like I thought it did. Play with it and you'll see what I mean.
