This software is essential if you are running a Dark Eye game and plan to create a bunch of NPCs. Even for players it is great as they this takes all the math out of the question and makes creating characters a breeze.
Furthermore this is a slick looking and feeling piece of kit and provides tool tips for all the various options so you don't have get all the books out to make sure you picked the right advantages or combat abilities.
I have created a whole campaigns worth of NPCs and a couple of PCs with this and everyon in my group it using it too.
I have recently started a second weekly game and this tool is fantastic when you make characters for other people as it is so quick and easy to change things around :)