I had used Django and Neo4J about 3-4 years ago now.
Neomodel is what I had gone with at that time as well.
In my opinion, it was reliable, but that wasn't the issue. Not every single use case we could write the query using OGM/ORM, fairly often I had to fall back to writing the equivalent of raw queries. But for basic queries and use cases neomodel was good and easy to write similar to the Django ORM.
Again, my experience is from a while ago, things might have improved since then.