It's a complet tool, you could copy only workbench, only custo, master data, ... you could specify a table and (for me) the best of the best you could copy a flow.
For example you would like to test a delivery note, the system will copy all the needed master data, the sales order, the delivery, ....
The first tool is to copy a system for a specific date, for example you would like to copy the data from the productiv to the dev for one month ...
it's really an incredible tool