A review from having used this project seriously for three months (self-hosted on a small NAS device, deployed/updated via Docker Compose): it's great. The web application is stable and very configurable (though ML performance will depend on the host). The Android web app is excellent, and a drop-in replacement for Google Photos. I'm still running the two side-by-side until they get to a stable release, but I wouldn't hesitate to recommend this as a self-hosted solution.