Virtually synonymous with desktop productivity tools, Microsoft Office is not just the market leader, it's the one product that nearly every user has on their PC. Not content with that situation, however, Microsoft continues to develop the product, with Office 2010 the latest implementation of its number one desktop best seller. It's being updated furiously, but Microsoft's once-irreplaceable program now has some viable rivals from the likes of Google Docs, OpenOffice and Zoho. Is it still and essential program for office workers, or an over bloated dinosaur not worth the return on investment?