One very important thing I took from getting my SCUBA certification from Underwater Sports is how much they stress safety. They have no patience for horsing around and will only train you if you take it seriously. They offer certifcation based on the PADI course. I feel like I am a better diver because of it. For a very reasonable price they offer classes that last about 2 weeks with 2 days of dive testing off the shore at Alki. If you take your classes in the fall the cost for the classes is greatly reduced due to the weather.