I've been running Immich on my Kubernetes cluster for a few months now. It was one of the harder things to install. I didn't use the "official" Helm chart because I didn't like it, instead just set it up myself. I use Cloud Native Postgres for DBs so I have backups already configured. I had to use a special image with vectorchord in it. It auto updates with flux and has been fine. The only time it wasn't fine was when I needed to manually upgrade vectorchord in the db.
The Android app is good but does quite often fail to open, just getting stuck on the splash screen indefinitely. Means I have to have another app for viewing photos on my phone.
One of the main reasons I wanted to install it is because my partner runs out of space on her iPhone and I don't want to pay Apple exorbitant amounts for piffling storage. Unfortunately it doesn't quite work for that; I can't find an option to delete local copies after upload.