My company hired Alan through a third party to teach an in house Level I class. As a Level IV analyst, I took it for recertification points and I figured if I got one good tidbit from the class it would be worth it. I wound up up taking over 4 pages of notes and only wish I had been able to take a class from Alan sooner. The information is not new, but the way he presents it and the approach he uses for vibration analysis makes it very easy to understand and is a great starting point for any Level I or a great refresher for a humbled Level IV like me.