The reviewer, Gail, praises the bye panda eyes! vol. def. masc. by .essence. for its non-smudging formula. Gail mentions that she has been wearing the mascara since 3:30 in the morning, and even after a long day, it has not smudged. She attributes any smudging to the eyeliner rather than the mascara itself. Gail describes the mascara as "awesome" and loves that it does not smudge. Overall, the bye panda eyes! vol. def. masc. by .essence. seems to be a reliable and long-lasting mascara that effectively prevents panda eyes.