I like SharePlex's Compare and Repair tool. 

The most valuable feature is the replication feature, since we are dealing with multiple projects at the same time. We are migrating close to 25 to 30 projects. If I just count the number of environments, it turns into probably 200 databases (more than 100 from the production environment).

There are some capabilities within SharePlex where you can see how the data is migrating and if it still maintains good data integrity. For example, if there are some tables that get out of sync, there are ways to find them and fix the problem on the spot. Since these are very common issues, we can easily fix these types of problems using SharePlex utilities, like compare and repair. So, if you find something is out of sync, then you can just repair that table. It basically syncs that table from source to target to see if there are any differences. It will then replicate those differences to the target.

Because of the volume of the transactions, we heavily use a feature that allows SharePlex to replicate thousands of transactions. It's called PEP, Post Enhancement Performance, and that has helped us scale tremendously.

The synchronization, data backup, and data transfer are all valuable features of the solution.

The core features of the solution we like are the reliability of the data transfer and the accuracy of data read and write. The stability of the solution is also excellent.

The core replication and its performance.

Performance is crucial, and SharePlex is by far the fastest. The way it handles replication to multiple targets along with basic filtering, as well as from multiple sources to a single target, is very efficient.