I have not taken the class. I have the manual and TDI's description in preparation for taking the class somewhere. I am disappointed in the manual, which is required material for the class. So returning the manual would be counter productive, no matter what I feel about the manual.
TDI publishes class content with required student performance, and certs instructors on it. They also may allow additional content. I am happy TDI allows additional content. I am disappointed with their provided and required content for this class. Their provided and required content for AN seem like Intro to tech plus nitrox/O2 math. That seems short for letting me strap O2 and 50% on my body and go diving.
In the dive class market I like TDI AN/DP. Just AN by itself seems to have some required skills shortcomings. That totally give me freedom to not learn them if my instructor does not add them. I just think that is not the best way for the class to be defined by TDI.
Unless there is a secret addendum in the instructor manual that says:
"If AN is taken by rebreather divers for O2 access, the standards are as published, as they will be on the loop or learn bailout safety in their rebreather class. If taken alone by non-rebreather divers, add 'how to avoid breathing a deadly gas underwater' from DP and all the depth and gas switch stuff to go with that."