While this tool works well with Magento CSV files, it has limitations when integrating with external systems that don't adhere to Magento 2 CSV requirements. For example, the mapping schemes only allow for column matching and don't provide the ability to modify cell contents. This can be problematic in scenarios such as merging two separate "quantity" cells from an external system, or replacing letters with numbers in the "status" cells. Additionally, if an external system uses a comma instead of a dot in the "quantity" cells, the tool cannot convert it to a format that is compatible with Magento. Overall, this tool is best suited for use with Magento CSV files and may require additional customization for use with external systems.

It would be beneficial to have additional capabilities, such as combining, transforming, and using equations (IF, SUM, MATH, ROUND, etc.). This would enhance the tool's functionality and provide greater flexibility for users to customize their data according to their needs.