Heartlyn raves about the Better Than Sex Mascara by Too Faced in her video review. She believes that mascara is the most crucial part of any makeup routine, and this product lives up to its name. Heartlyn demonstrates how the mascara enhances her lashes, making them look voluminous and similar to false eyelashes. She also mentions that it brightens and enlarges her eyes, giving her a more glamorous look. Heartlyn highly recommends this mascara and urges viewers to give it a try. Overall, the Better Than Sex Mascara by Too Faced seems to be a fantastic product that delivers impressive results.