Word
processor, spreadsheets and presentation are the common components in any
Office solution.
Microsoft
makes a lot of money on their office product and its brilliant, especially in the
integration to all their other products.
So if you are not into Microsoft Sharepoint,
CMS, Access….. There is really no reason why you should not use one of the open
source solutions. They have at least the same level of functionality,
security and user friendliness.