IMHO, it is less the agency than the skills you learn.
Most programs offer a basic coverage of the essential skills, and instructors may add to the course (but don't count on it).
I would encourage you to ask any potential instructor if the training course includes instruction on the use of dive tables. As I recall, SDI does not require this for their open water certification.
Most programs offer a basic coverage of the essential skills, and instructors may add to the course (but don't count on it).
I would encourage you to ask any potential instructor if the training course includes instruction on the use of dive tables. As I recall, SDI does not require this for their open water certification.