A friend of mine had 3 people fail his OW class. 2 failed the swim and one was just in constant panic mode. My friend had some choice words about the ones who wore themselves out during the swim and didn't float to rest, but the instructor treated them well. The instructor (also my old instructor) has a policy that you can keep coming back with his scheduled classes as many times as you wish until you can pass the skills. He will take some extra time with you before and after class to help. I bet he would charge extra if he had to specially schedule the pool for one student but otherwise he considers it part of your original fee.