I recently attended a Category I Mobius class in the Dallas Fort Worth area of Texas. Alan was the Instructor. I am new to the vibration analysis and reliability sector and was not sure of what I was getting into. I can say that Alan made the class very informative and interesting. He explained things completely and answered questions without hesitation. I highly recommend him if you get the chance to attend a class. I am looking forward to signing up for Cat II when I can.