This thread has been raging for 2 years and 11 months? Inconceivable!
I've used every version of Apple's "iWork" (Apple doesn't refer to Pages, Numbers and Keynote as iWork anymore.) back thru its introduction on 2005. Plus FileMaker. I'm fully capable of delivering product using "iWork".
I've used every version of Microsoft's "Office" Word/Excel/PowerPoint/Mail/Outlook on Macs (starting when they became available in 1985, 2 years before Windows).
I've used every Windows version of the Office apps, including Access, Visio, Project and Publisher (which was Ventura Publisher before Microsoft bought it). I've even dabbled in Dynamics, even before 1999 when it was Peachtree Acconting.
I've used all MS' abortive apps for personal finance, graphics, audio-visual creation, and web page design (some of which lives on in Sharepoint) on both platforms.
I've used OpenOffice and most of its forks, including natively on Linux.
I've used Apple's Cyberdog and even BeOS. I developed programs with Smart Form, Mac Project and HyperCard. I beta tested OS X.
I've watched C-beams glitter in the dark near the Tannhäuser Gate, dang it!
Not to be prideful - except I can't help it - but I find Apple's Pages/Numbers/Keynote less capable than Microsoft Office for rigorous, professional, collaborative, cross-platform writing. For example, Pages is missing, awkward or unstable with critical pro-level features (real-time clickable text navigation, Tables of figures, Table of contents, Index cross-referencing, concordance files, document version deltas, multi-document consolidation, in-document hyperlinking, digital rights management, digital signing, data fields for forms that can be extracted to a database... There's more.
Furthermore, I find Apple's sidebar UI needlessly dense, fussy and disorganized. I put up with the crazy sidebar in FileMaker Pro, because it's best in class, as far as I'm concerned, but Pages just makes me tired.
I'm not a fan of Microsoft's Ribbon, either, though. I don't know how to improve it with only two dimensions to work with. There is utterly massive potential to work in the third dimension with Apple's Vision Pro. But $4000! Daaaang, I can't affort that! That's, like, almost a whole tank of gas!