Hi, PADI is an excellant agency, however as in ALL new educational endeavors - there are GOOD teachers and BAD teachers. Find one whom is patient, pleasant and understanding. Ask for refs from prior students - if possible, and avoid those with big 'egos' and 'attitudes.' Find the right teacher and you'll have fun! Find a bad one and you will not enjoy yourself and/or wind up dropping out! I have seen MANY new people drop out of this sport because of an instructor whom was not patient and understanding of the students problems, concerns or fears during a OW course - and instead of 'working with the student' providing extra help, they got intimidated and dropped out. Good luck!