Hi
Congratulations!
As a first try, both of you pretty welll succeeded. I imported quite a complex odt file with some titles, lots of footnotes... It was converted straight out the box using the provided "custom" style-sheet.
Now I will make further tries to tweak it to my own style-sheet and style-mappings. As we do not have the initial front panel
writer2xhtml, provides, I think it will probably be necessary to use the metadata editor of Sigil to complete the missing fields we can't fill in LibreOffice.