JV Jiu Jitsu Rancho Cucamonga - Javier Vazquez, located in Rancho Cucamonga, California, has received a mix of feedback from its students. Overall, many reviewers praise the quality of instruction and the welcoming atmosphere, highlighting the practical training for self-defense and the positive environment for both kids and adults. However, some concerns have been raised about the instructor-to-student ratio and the need for more aggressive training methods. For more detailed information, it is recommended to contact the school directly.