Forgive me if this is a dumb question but I guess I'm not entirely clear on what Docs to Go does. Like, can I make fresh new word/excel/PP files straight from my iPad? Is there any point to having all of these apps or can one do with just one set? I already have Pages and I need to make edits to an excel document so I'm just wondering if I should get Numbers or the whole Documents to Go app. Thanks!