The knock I have against iWork (at least with Numbers since I use that more then the word processing app) is its been hamstrung by apple. It always lacked features when you compared it against Excel, but now its down right embarrassing in what it lacks, since being updated. There was a rich set of templates available to provide a nice looking spreadsheet, not just a handful. That's just one example.
I use Numbers over excel because it does give me the ability to run it everywhere thanks to iCloud but I'm really disappointed in the lack of features
I totally agree with you.
It reminds me of the first release of Final Cut Pro X.
Hopefully, iWork will also be improved in time.
That's what I feel, regarding the Mac version of Microsoft Office vs Windows.
So far, it's been hamstrung by Microsoft, in the features I said before, and many more and from my user experience it's far from being properly optimzed for mac - very slow.
Localization, dictionary and thesaurus are in no way comparable to the windows version.
The difference is that iWork is free.
Also this is the main reason, many users in Portugal (and other countries) use either Bootcamp, or virtualization/emulation (apart from games, Crossover compatibility requests and tests, lay mostly on Microsft Office) to run the windows version - an aditional cost and setup workaround, apart from not being native and therefore optimized. Not a satisfactory solution for me.
I'm not saying Microsoft Office for Mac is bad, but If I pay, I demand a good solution for the Mac, really design for the Mac (not just a kind of a crippled port), with all of the above and the mac's user experience philosophy in the concept.