It's managed, serverless, and highly scalable. The ability to write typescript like queries, and have all the reads and updates be globally consistant is amazing. The ease of projecting extra data greatly reduces the need for round-trip queries which makes everything that much more performant. Finally, the fine-grained security makes it easy to allow the client to directly query the database!

It removes the most painful part (in my opinion) of the relational database, which is the operation. As a developer looking to just develop, it gives me the abstractions and tools I need to develop the data store my app needs, without having to worry so much about how I will operate, patch, and scale the database. This isn't to say that database knowlege is not required at all, since it will happily let you write horribly inefficient queries like most databases. The recent introduction of schema enforcement to collections (tables in RDBMS parlance) along with custom check constraints makes it that much easier to migrate from your existing RDBMS. The flexibility of having schemaless or partially typed collections means that prototyping is easy and allows clamping down on the schema over time as the requirements become solidified. The ability to run logic operations, assign variables, do math, perform list/set transformations, and other things you would normally do in code inside the database makes it particularly well suited to a serverless environment. You can keep all of the transactional business logic within Fauna so that it is truly transactional, with much less application code to handle what happens if a transaction fails part way through. It is also regionless, meaning any edge compute service you may use will automatically connect to the closest replica to keep request times down for a globally distributed user base. Note that they do offer USA, EU, and Global database options with slightly different usage based pricing. Their free tier is also generous enough to prototype and run apps in order to determine if it's worth scaling the usage throughout your organization.

When I say "best of every world", it's hard to quantify. But when I talk to people about Fauna and explain it's a globally distributed, fully serverless, ACID compliant, document based relational database they always say something alongs those lines. Fauna has solved so many problems for us. It has the flexibility of a document based database and the power, security and reliability of relational database. We've been able to streamline our code, reduce response times and add powerful new features as a result of replacing DynamoDB with Fauna. Not only that, but its a breeze to set up and get the ball rolling. The FQL query language is simple, but powerful. If you can write code, you can write FQL. There's no learning curve to understand a new query language. There are some quirks to gets to grips with, but we've worked closely with the team at Fauna and they've been amazing. We believe that Fauna is the future of databases, and that when you decide to give it a try you'll agree with us.