Manic Muscle Labs appears to be a legitimate company. The company's products are manufactured to a high standard within a GMP certified & FDA approved facility. They have a positive review on Scamadviser, indicating that the website is safe to use. Additionally, they have been rated excellent on Trustpilot. However, there are mixed reviews on Reddit, with some users reporting positive experiences and others reporting less satisfactory results. It's always recommended to do thorough research before making a purchase from any online vendor.