I had completed the Tableau Certification Training in San Francisco in GangBoard. The course content is very good to understand. The instructor is experienced and having the patience to clear all the doubts at training time. The training was well organized and structured. Best in the class support team, they will respond very quickly to your concerns. The study material and exercise are very good. Also, the good part is that the sessions are recorded so that you can refer to them later as well. It helped a lot to understand the topics and gain confidence in the learning topics. Importantly, there is lifetime access for the course. I will strongly recommend GangBoard for training. It was a nice experience.