RethinkDB's ReQL is a very powerful functional query language. The functional aspects of ReQL and the straightforward implementation of the Node driver for Rethinkdb make it a natural fit for Javascript developers. You no longer have to type some obscure syntax in quotes (aka SQL), your queries are just "natural" Javascript functions in the same way you would use lodash to handle your collections.

Only takes about 30 seconds to install. They also have a docker file for running it on AWS, Google Cloud or your own.

Using the clear JavaScript query language, you can specify any query you like, and then ask it to watch that query. This gives you real time events asynchronously.

RethinkDB has administration tools in both CLI and GUI (web app). You can view whats going on right away by going to localhost:8080. The data explorer allows you to run queries on the db.

RethinkDB is scalable horizontally. It has support for sharding, parallel queries and MVCC concurrency.

You can directly tell it to shard/replicate and how many shards/replicas depending on the amount of nodes. Each node doesn't need anything except one other node's ip/port in the cluster to join and maybe the auth.