CZTL has received mixed reviews from users. Some customers have praised the high purity and effectiveness of their products, particularly the Methylene Blue solution. Positive feedback highlights the genuine medical grade quality and usefulness for various applications. However, there are also significant concerns raised by other users. Critical reviews mention issues with inconsistent concentration, hazardous risks, and poor packaging. Additionally, some customers have reported delays in order fulfillment, lack of communication, and unresponsive customer service. Overall, while some users find CZTL products beneficial, others have experienced problems that affect their trust in the brand.