some thoughts:Happy testing, and as I said, keep it coming good or bad.
1. when JOIN-ed a device, display the main-speaker's name of the Group (same as on the display of the BS35)
2. Extend with a Favorite page (per NL device) in addition to the dots. Every Favorite page can hold op to ten artists/albums/tracks from Deezer/DLNA. In the B&o app the favorites can be chosen (changed, deleted).
3. ML sources connected to a BLC and set as integrated, can be choosen and started. But if for example one wants to change from Phono to A.Tape, despite the change in showing the A.Tape as source, the Phono continue to play (Note: this isn't only a phenomenon in the Halo, the app does the same). To change one first has to Std.by the ML/NL device and start the NL/ML master again with the other source.
4. add Standby for linked products.
5. confusing: if one wants to push a software update, one expect to search Product Settings of the Halo in the app, but one has to go to Settings, Products, Halo to push the software update. (maybe also a point of inprovement in general for the app. Sometimes "settings" are shown twice)
6. One iDevice is used to setup the Halo (f.e. iPhone). The other iDevice (iPad) doesn't show the image of the Halo (it becomes visible after adding a new Halo, but canceling the setup thereafter).