The Perfect Point Plus Eyeliner in Black onyx color by Covergirl receives a glowing review from Shannon. According to her, this eyeliner works exceptionally well in the crease line and upper eyelid. She praises its long-lasting formula, stating that it stays put all day. Shannon wholeheartedly recommends this product, giving it a perfect score of 10 out of 10. Overall, the Perfect Point Plus Eyeliner in Black onyx color by Covergirl seems to be a reliable and effective option for achieving a flawless eye makeup look. However, it is important to note that the review does not mention any potential drawbacks or specific details about the product's performance.