Ah then, what constitutes "best"? Those who are convinced that best=most rigorous choose one agency. Those who feel that best=easy choose another. I don't believe that either extreme is "best". There's a balance between fun, control and ultimately safety and so I choose NASE as the agency I certify OW students under. I choose the agency that fits me best and potential students should choose the instructor that fits them best. If you want to have loads of fun, have awesome control and be an exemplary diver, then I'm your Huckleberry. You'll be required to think and you will discover that trim//buoyancy aren't the dark arts everyone makes them out to be. I teach NASE because I like their philosophy that every dive has only one descent and ascent with a safety stop. It's safer for the instructor and sets the proper example for the students. I also like their philosophy that there should be no kneeling during Scuba. Moreover, students are required to remain trim and neutral throughout every dive and not just for ninety seconds at a time. As a perk, snorkels are not required during scuba dives.
Agencies don't train divers: instructors do. Agencies don't certify divers: instructors do. Choose the instructor that fits you and don't worry about the agency. That's the instructor's job.
Agencies don't train divers: instructors do. Agencies don't certify divers: instructors do. Choose the instructor that fits you and don't worry about the agency. That's the instructor's job.