The main aspects that are valuable include:

• It is compatible with the wire protocol of PostgreSQL. All applications did not need to be modified. DBeaver and SquirrelSQL worked with the normal PostgreSQL JDBC drivers. Libraries for other languages (C++, Go) also worked.
• The subset of SQL that my client is using is completely supported.
• The Cockroach documentation is extensive.
• Cockroach University is a very good starting point to learn.
• The availability of the open source offer, no strings attached, allows a full evaluation of the product.

The most valuable features of the solution are its resiliency features and the geo-partitioning capabilities.

The distributed nature of CockroachDB helps us isolate the data when required. We also have some application logic that determines where the data must go. The best feature of CockroachDB is the ability to keep the nodes in different locations. It solves many problems.

The product has valuable security features. It is easy to set up SSL certificates for communication between nodes. It has a user-friendly observability feature in terms of UI, helping us monitor login performance, identify slow queries, and view latency between the nodes. It is very adaptable, allowing us to tune specific details easily. It is based on a distributed architecture that determines and manages the number of nodes. It has an automatic rebalancing feature to manage the scenarios where nodes go offline and return online. It provides good performance if used for the right use case. Additionally, its compatibility with Postgres is a valuable feature as well.

The tool's most valuable feature is node syncing, which takes only 0.54 milliseconds. 

The availability and the easy to use feature is the most valuable. The documentation is also good. 

The initial setup and deployment are simple.

I think CockroachDB has two important valuable features which are my favorite:

1. Having high fault-tolerance for clusters level and even data center level, which may run by a simple process.

2. The learning curb was low (for me at least). This comes into play for installing, deployment, SQL and more.

I think that this DB is helpful to easily and speedily provide a single and large service to the world.