[ttcbj]

Coming from a rails background, I have really enjoyed developing against Firebase.

Cloud Firestore so much easier than deploying a rails app somewhere. It comes with a lot of great analytics tools. The auth stuff works great. The documentation is very good. It has been extremely reliable. Syncing across devices is amazing and seamless in my experience.

If it fits your use case (I think mostly CRUD apps with data sharing that is somewhat limited in its breadth, e.g. not something like twitter with N-N data relationships), it is really amazing.