The Arch Brow Volumizing Fiber Gel in Soft brunette color by .Hourglass. is highly recommended by Juliana, a full-time model, for enhancing natural brow shape. In her video review, Juliana highlights the product's microfibers that help fluff up brows, giving them a fuller appearance. The gel's ability to volumize and define brows makes it a must-have for anyone looking to enhance their natural brow shape. While the review does not mention any drawbacks, it is important to note that individual results may vary depending on brow thickness and desired look. Overall, the Arch Brow Volumizing Fiber Gel by .Hourglass. seems to be a reliable and effective product for achieving fuller and more defined brows.