Opal's review of the essence bye-bye Panda eye mascara highlights its impressive qualities. She mentions that it is long-lasting, smudge-proof, and provides both definition and volume to the lashes. Opal also notes that the mascara can be built up for a more dramatic look. Despite crying for four minutes, she mentions that the mascara did not streak or smudge, unlike her eyeliner. Opal rates the product a solid 10 out of 10 and highly recommends it. Overall, the essence bye-bye Panda eye mascara seems to be a reliable and effective option for achieving defined and voluminous lashes without worrying about smudging or streaking.