If you are using alternatives than it makes sense to stick with them.
However, if you are using Office then do it.
THis version is more of an Mac Office than any other MS Office.
It has better integration on many levels.
It handles graphics in a better way (but not as well as iWorks)
It also has some good graphing capabilities.
I also like that PowerPoint handles Arabic properly.
And of course, MS Word remains the best word processor, and for some people/projects there are no substitutes.