The Bye Panda Eyes! Vol. Def. Mascara by Essence is praised by reviewer Leah for its long-lasting and smudge-proof formula. Leah applied the mascara to her lashes and found it to be volumizing with little to no clumping. She was impressed with how well it worked on both her top and bottom lashes. Overall, Leah considers this mascara to be super nice. While the review does not mention any drawbacks, it is important to note that individual experiences may vary. However, based on Leah's positive feedback, it seems that the Bye Panda Eyes! Vol. Def. Mascara by Essence is a reliable and effective option for achieving voluminous lashes.