Exactly. 365 gets you perfect compatibility and the 'real tools that professionals use'. Not Google Docs or some weird Apple thing - the tools that always will read the document.
If you can navigate the terrible UI enough to find the open button on the proper 'ribbon', that is. The ribbon makeover should have textbooks written about it so we can teach our future UI designers not to make the same mistakes again.
Google docs actually has better MS Office compatibility than the 365 Web Apps.