The only way to really know is to download it for yourself and check it out. It's hard to generalize about its suitability since every business has different needs, but it's probably worth checking out.

Here's a good background article about it:

KOffice
http://en.wikipedia.org/wiki/KOffice

"KOffice is a free open source office suite which is available for FreeBSD, Linux, OS X, and Windows. It contains a word processor (KWord), a spreadsheet application (KCells), a vector graphics-based drawing tool KOffice Artwork, and a presentation program (KOffice Showcase).

In late 2010 most KOffice developers formed Calligra Suite that now contains a number of features present in KOffice 2.3 but not later versions."

Here's a comparison of KOffice 2 and OpenOffice 3:

http://www.ehow.com/info_12199562_koffice-2-versus-openoffice-3.html

"The ability to disseminate information is critical for business, science, education, government and the arts. Office suites are important tools that make the assembling, editing, redacting, formatting and sharing of knowledge efficient. KOffice and OpenOffice are open-source office suites that feature word-processing, database, spreadsheet, drawing and presentation applications. Both run on Windows and Linux operating systems and are free to download, use and share with others."