In the wide world of fitness/training, there are many things that GMB's programs don't cover (for example, all of GMB's programs are body-weight only), so if GMB's programs don't cover your area of interest, than it obviously makes sense to use something else. HOWEVER, if GMB's programs DO cover your area(s) of interest (or you're just looking for general physical-attribute development and don't have a preference on exercise type), investing in one or more GMB programs should be the easiest decision of your life because GMB is by far the best fitness company that I've ever encountered - amazing training platform, fantastic instructional videos, best-in-class customer service and support, extremely effective programming, etc.