GreatFrontEnd (GFE) was an indispensable resource in my interview preparation. It provided well-structured, in-depth explanations that significantly improved my frontend system design skills and JavaScript fundamentals. The detailed solutions and curated problem sets helped me not only ace interviews but also become a better engineer overall. Thanks to GFE, I successfully landed offers from Microsoft, Lululemon, ADIA, and LaunchDarkly, and I highly recommend it to anyone preparing for frontend interviews.