Tatiana reviewed the Pen Pal 4-in-1 Makeup Pen by Alleyoop, a versatile cosmetic product that combines eyeliner, brow pencil, lip liner, and highlighter in one convenient pen. She expressed skepticism about its claims but was pleasantly surprised by its performance. The pen's multitasking abilities impressed her, and she found it to be a time-saving solution for her makeup routine. Tatiana highlighted the convenience of having four essential products in one compact pen. However, she did not mention any potential drawbacks or negative aspects of the product. Overall, Tatiana's review suggests that the Pen Pal 4-in-1 Makeup Pen by Alleyoop is a reliable and efficient tool for achieving a complete makeup look.