This is by far, one of my favorite hair products. As a stylist, I tend to go overboard with heat styling. Once a week, or whenever needed, I love to spritz some onto my mid-shaft to ends to freshen it up and give it that sleek, well-kept look. This doesn't leave any noticeable build-up or residue of any kind that many other serums/oils leave. The only thing I dislike isn't the product itself, but the price. Birchbox seems to have it at one of the lowest prices I've seen, but most drugstores or retailers that carry it tend to charge upwards to $24 or more. Definitely worth the splurge, though!