[WirelessGigabit]

I have experience with Neo4j as a consumer of the database, but as part of a project where someone else wrote the queries.

I hate it. It's extremely expensive. It's slow. Very slow. It only recently had multiple databases per instance. It doesn't support per database encryption. Did I mention it's slow?

We also looked at the ongdb effort, but that went offline all of the sudden due to licensing issues. Now it's back but they reset (?) the version number. Confusing. Also, that one is built in version 3-ish. So no multi-db. While you can spin up multiple instance (it's free?, it's still Java, i.e. slow and eats memory.