The term AOW covers a wide range of courses depending on which agency / instructor running the course ( I instruct for an agency, BSAC, which has no direct equivalent). In my own training I took a PADI AOW course, so my comments are based on that experience. I think that, as others have already said, what you get out of an AOW course is proportional to how much you AND your instructor put in to it. As I see it five dives with agood instructor on which you work to increase your diving skills is never a waste of time or money. With a good instructor it is always possible to learn something and have fun (that is why we do it afterall). So my advice to the OP is find the best instructor you can and do the course.