I just tried opening a Word document, a Powerpoint, and a .pdf. the MS files open, but they are still in the PKard browser; I can't save them to work with them in Pages, Keynote, or any other app. PDFs, however, have an option to export to anything. It almost looks like pdfs open in iBooks and from there can be exported across the system in standard IOS form.
For attaching documents, again the Thursby software appears to only access Photos. It comes up with the "Take new photo" or "Use existing" buttons.
At any rate, this app/hardware solution gets the job done for staying on top of work emails when I don't have access to a CAC-enabled computer, but some workarounds are required to get to where you have full editing control of documents. When I need to edit a document, for example, I'll forward the email from Thursby to my me.com email and use the full suite of functionality and system integration that comes through the Mail app.
One MS releases Office for IOS and if Thursby would update their software to integrate better into IOS, this would be a more useful app.