The Shack System Martial Arts in Glendora, California, is praised for its tight-knit family community, knowledgeable and patient instructors, and supportive environment where everyone is willing to help one another. Reviewers highlight the caring nature of the coach, who is described as treating his students like family and ensuring their well-being. The gym is recommended for both children and adults looking to learn martial arts in a welcoming and inclusive setting. Contact the school for more information.