One of my clients needed me to help them redesign their complex control panels in order to help their sales team understand the data, without having to read a manual. I needed to brush up on the subject, so I enrolled in the Information Visualization course at the Interaction Design Foundation website. In a matter of weeks, I completed the course and earned my certificate. The course helped me design a far more user friendly and easily understandable control panel than I would have been able to design without attending the course. On behalf of myself and my client, thanks!