1. Spreadsheet-ParseExcel supports all of those formats.

2. You cannot access the checkbox values. *

3. You cannot extract embedded objects. *

4. It is correct that the memory consumption is a function of the amount of cell data and not of the actual file size. See also: Reducing the memory usage of Spreadsheet::ParseExcel.


* While it isn't possible to do this using Spreadsheet::ParseExcel it is *theoretically* possible to do it via OLE-Storage_Lite. It would require a lot of work however.

--
John.