I really use it every day, whether on my iPhone or my Apple TV 4K. The Infuse + Synology DS218play pairing works wonderfully. It plays all the files to me, whether 1080p or 4K HDR... a treat with my Sonos home theater.
A small improvement to make, the PIP function has been added to the Apple TV. Since it is available on iPhone and also on the Apple TV application, why not offer it as well?
But otherwise really perfect!!!