10th Planet Jiu Jitsu Naperville, located in Naperville, Illinois, is a gym that has garnered a mix of reviews from its members. Many reviewers praise the welcoming atmosphere, knowledgeable instructors, and supportive community, making it a great place for both beginners and experienced practitioners. However, there are also concerns regarding safety during open mats, with reports of injuries from more experienced members. Overall, potential visitors are encouraged to proceed with caution while also considering the positive experiences shared by many. For more information, it is advisable to contact the school directly.