It uses the Spreadsheet::WriteExcel interface but is in a different namespace for reasons of maintainability.

Not all of the features of Spreadsheet::WriteExcel are supported but they will be in time.

The main advantage of the XLSX format over the XLS format for the end user is that it allows 1,048,576 rows x 16,384 columns, if you can see that as an advantage.

From a development point of …