This is my last step in my hairstyling routine - it smells great, adds terrific shine (but not an oily look, just a healthy-looking sheen), and helps resist frizz. It's insufficient on its own for reducing frizz in my naturally very curly hair (think ringlets) but might work for straighter hair less prone to frizz. One bottle lasts a decent amount of time given the price, too, and it hasn't weighed my hair down.