The reviewer, Isabel, tried out the bye panda eyes! vol. def. masc. by .essence. and was impressed with its lightweight feel. She found the applicator to be nice and the mascara to be lengthening, which she really liked. Isabel mentioned that she would test its smudge-proof claim and provide an update later. Overall, the mascara provided a lightweight feel and lengthened her lashes, making it a beneficial product. However, without the information on its smudge-proof performance, it is difficult to assess any potential drawbacks. Nevertheless, based on Isabel's initial experience, the bye panda eyes! vol. def. masc. seems promising.