It’s decent with some caveats.

My use case is to have a shared backup repository with my wife. I could’ve (should’ve) used a shared account but I set us both up with individual accounts and used the library sharing feature as that seemed to be the “correct” way to do it. Except that face and other useful data isn’t shared between libraries so it works very differently to how Syno Photos works when uploading directly to a shared space.

The app also doesn’t have separate settings for internal and external URLs, so while I use cloudflare tunnels for most things and call it a day, the data limits they impose meant that I had to setup a reverse proxy internally to make it work over HTTPS while on my home WiFi.

Development is moving at a hell of a pace though, so I’d be surprised if these things weren’t fixed in short order. Meanwhile automatic backups have been working flawlessly.