What the attached file contains?
There is a ZIP file attached with this post.
The docx file is a sample Word 2007 document which contains headings, body text, outline numbering, bulleted lists, formatting, page break, header/footer, table, images, table of content etc.
If you open this file in any compatible Office app (Pages, Office 2 HD, Quick Office, Doc 2 Go etc.) you can easily verify which features are supported and not.
The pdf file shows how the document looks like in Microsoft Office 2007 (in case you don't have Word 2007 desktop).
I hope it helps you discover what formatting you may lose at the beginning rather than discover as you work on iPad.