An OGM is the part of your graph code you stop re-writing.
An object-graph mapper turns models into Cypher and records back into typed objects. You still get a graph. You lose the string-building, the unwrapping, and the schema bookkeeping.
Create one person.
One query per read.
Hydrating a movie and its cast by hand usually means one query for the movie and one more per related node. Eager loading and read-model decorators fold all of it into a single statement.
Every extra edge to hydrate is another trip. Latency grows with the size of the answer.
@RelatedOne, @RelatedMany, @RelationshipCount, @Computed and @Expression all project into the same statement.
Errors you can switch on.
A typed taxonomy instead of parsing driver messages. Validation failures arrive together, before anything reaches the database.
A migration workflow for your schema.
Your models declare constraints and indexes. neode compares them with what is installed and walks you from one to the other.