Microsoft Office 2007 got quite an overhaul from all its previous versions. If you are not currently familiar with it then you will likely be relearning a lot of basic things you already know how to do. Granted once you get used to it many things will become quicker and easier, but if you download Office 2007 you will spend some time getting acquainted.
With the Office 2007 Download you will find that Word, Ecxel, and Powerpoint give you crisp and fresh documents. Also Outlook has a new scheduling tool that is definitely a step up from all the previous versions.
When working in Excel from the Office 2007 Download you will find the top toolbar to a complete change. Commands are grouped in to categories and once you get familiar where to find everything you can breeze through spreadsheets like there is no tomorrow. If you work with large documents in excel that have a large number of records then you will want to definitely get the Office 2007 Download because it greatly increases the number of records that Excel can handle allowing you to do much more work in a single spreadsheet.
One downside if you decide not to download Office 2007 is that you are going to need still download special software to open any documents that someone might send you that came from Office 2007. The file extension are no longer the same and conversion software is needed. So if you are stubborn and don’t want to update and learn the new tools then you will still need to do a special download when interaction with others that have decided to take advantage of the Office 2007 Download.