Antimetal is highly praised for its ability to significantly reduce AWS costs through automation, with users noting its user-friendly interface and efficient setup process. The platform is particularly beneficial for startups, offering free services for the first year and a pricing model based on savings. Users appreciate its AI-driven analysis that optimizes AWS usage without long-term commitments. However, there was a negative mention of customer support. Overall, Antimetal is seen as a valuable tool for managing AWS expenses effectively.