A client copies & pastes from MS Word into your CMS and suddenly your lovingly hand-crafted HTML is full of stinking, invalid, word generated, formatting code. Eww.
The only way to avoid the problem was to paste the text into a plain text editor (like notepad.exe), copy the text from the plain text editor, and then paste the text again, this time into your CMS. A bit crappy.
With Suds just copy the text from Word, click the suds icon and bam, nice clean text ready to be pasted into your CMS. Awesome.