Not as good as Apple Photos unfortunately (for photos and video), and I say this as a proponent of SyncThing [1]. On device facial recognition, album sharing and syncing, etc.

Most people’s time is worth paying for something that just works.

https://news.ycombinator.com/item?id=20160755

I used syncthing for a while but I found it was murdering my CPU. Didn't bother trying to solve that problem - just uninstalled it since the value it was providing me was less than any troubleshooting effort would have been.

I second this. Syncthing has gotten to the point where it just works, and if it doesn't ever just work (once/twice a month if that), a restart of the syncthing service clears it all up.