I have purchased a few Home study courses for further training, and found them helpful. It really all depends on what you practice, and how the teacher teaches. I practice Aikijutsu locally, and have purchased Jujutsu courses, in which supplement my training, and make it easier to advance. I also practice Ninjutsu locally, and have bought tapes for that as well. but there is a difference in buying Videos and home study courses. Videos are just that, videos. home study courses usually offer the opportunity of advancement. It helps if you practice locally, but its not entirly neccessary. I was once told that for someone to teach, it is not neccessary to have a high rank, affiliations with a major org, multiple black belts, and so on. it is only required that they can teach. if you think about it, that is all that is relevant. period. I mean, it helps to have 30 years of experience, but I have met teachers that have 25 years of experience and they cant teach worth beans. If someone can teach you effective MA, and do it right, that is all that matters. whether its by video or not.
K.D. Elliott