Customers say these engineering kits are fun and engaging to build, with clear instructions and helpful video guides. Many appreciate the educational value, noting they spark creativity and teach coding basics. The subscription format excites children who eagerly await each bimonthly delivery. While most projects work well, some experience issues with motors, servos, or missing parts. Common feedback includes praise for responsive customer service that quickly replaces defective components. Parents value the hands-on learning experience and problem-solving skills these kits develop. Some mention quality control concerns and occasional connectivity challenges with coding features.