Sustainable Tomorrow appears to be a legitimate website. Customer reviews on platforms like Trustpilot and Loox indicate positive experiences with their products, particularly the Zen Bamboo Electric Toothbrush. Users have praised the eco-friendly design, effectiveness, and customer service. However, some reviews mention occasional issues with product quality, such as toothbrush heads not fitting properly. Overall, the majority of feedback is positive, suggesting that Sustainable Tomorrow is a trustworthy site for eco-friendly products.