I thought (the instructor) was excellent at explaining the reasoning and scenarios when/why you would be using different callouts/modifiers rather than just saying what they mean. It really helped me grasp how all these concepts go together and what they look like in the real world. The book had great examples and pictures that made the concepts easy to understand and how the measurement/gaging would look like in the real world. This class definitely met my expectations. I have previously taken a basic GD&T course at a previous company but this time was the best at explaining and making things make sense to me.