Tia, in her video review of the KES NANOBLACK 3InOne Flat Iron by Kristin Ess, expresses her excitement and satisfaction with the product. She describes it as the best flat iron she has ever used, praising its ability to not only straighten hair but also create perfect curls. Tia highlights the unique shape of the barrel, which is perfectly designed for barrel curls. She demonstrates the versatility of the flat iron by showcasing a braid out style that she achieved by flat ironing the braid. Tia is impressed with the beautiful curls that result from using this flat iron. She also mentions the quick heat-up time of just 20 seconds, making it convenient to use. Overall, Tia considers her purchase of the KES NANOBLACK 3InOne Flat Iron to be the best she has made on Flip.