I am leaning toward NASM, I talked with one of their customer service reps yesterday, he said that 60 out of 100 pass their test and he felt that the 40 who didn't pass didn't study. I think it is like anything else in life - you get out of it what you put into it. NASM said you have 120 days to complete the exam from the date you received the material. I hope that is enough time to prepare. I have two small children, a husband, a house and a dog to care for....