JJK Hapkido-USA, LLC, located in St. Peters, Missouri, has received a mix of feedback from its patrons. While some reviewers praise the welcoming atmosphere and the dedication of the instructor, highlighting the positive impact on students' confidence and skills, others have expressed concerns about the treatment of potential students. Overall, many appreciate the family-oriented environment and the focus on real-world self-defense training. For more information, it is recommended to contact the school directly.