This serum definitely delivered on shine! My hair looked noticeably glossier and smoother, making it easier to style and manage. The formula claims heat protection, and I felt confident using styling tools without worrying about excessive damage. The serum didn't weigh my hair down or leave any greasy residue, which is crucial for my fine hair. Though my hair felt softer and looked shinier, I didn't see a significant improvement in strength or reduction in breakage over an extended period. The spray nozzle can deliver too much product at once, requiring some finesse to get the right amount without overdoing it. Overall, this serum adds beautiful shine and manageability to hair, making it a great styling aid. It also offers some heat protection and a pleasant scent. If you prioritize shine and heat protection for fine hair, it's worth trying! **This review was collected as part of a promotion.