So in the last few days I've been putting Documents 2 Go through some rigid testing (and playing around) to see how well it fairs - and I'm rather impressed with the copy I downloaded, despite it only being a trial version. It seems DataViz seems to have got this app spot on with regards to business users; but enough of my praising - let me show some screenshots first of the app.
Installation of Documents To Go is fairly straightforward and easy - once it's installed (which can be done by transferring the SISX file to your memory stick or via the PC Suite), three different apps will appear under the 'Tools' folder - DocumentsToGo Sheet/Slide/Word. The three apps allow for the editing and creation of Word, Excel and Powerpoint files on the go on your smart phone.

In the first part I'll elaborate more about DocumentsToGo Sheet app first: it really is rather fantastic and easy to use. As you can see from above, the interface bears a bit of resemblance to QuickOffice, which comes along on the SE P1 phones, so it shouldn't be too much of challenge for first time business users. However, the user gets a couple more options in customising the Word Document compared to QuickOffice - for example, inserting page breaks, bookmarks, hyperlinks, manipulating tables, etc.
Opening existing Word Documents was extremely easy and intuitive, and the support for older Word files (XP) as well as the newer version of MS Word makes this a very powerful utility app for those who need to regularly edit and manipulate Word Documents on the go.
One major flaw that would hinder the overall experience that I found in this app was that when creating a new document and inputing characters in to the document, every letter would appear to be in uppercase, if the user has set Auto-Capitalisation on. The workaround is to turn off Auto-Capitalisation in order to get all the letters to appear in lowercase - it's very tedious and frustrating if you've got alot to input, and it more or less defeats the purpose of auto-capitalisation (which does not mean capitalising every letter). I presume an update and fix for this problem is in the works.
Overall, I found the experience of using this app a pleasure (save for the capitalisation problem) and definitely gives QuickOffice a run for its money. Hardcore Office users and Business users would love this application.