I have taken it several times over the years for different reasons that have required it, various counselors, headhunters, or workplaces. My categories have changed each time I have taken it but my diagnoses have a lot to do with that. However, what I have learned from it are my strengths and weaknesses and how to better communicate not only from my own standpoint but to recognize those same/different categories in others to know where they are coming from. For these reasons, the test and knowing about, it is invaluable.