Most skincare products from Glossier are not worth the price point, but this one and another I'll name are. Yes, there's niacinamide in lots of products in combination, but I think there's something to be said about the quality of the ingredient. Many niacinamide combined products tend to break me out in a non-purging way. Also I usually only use this during the day, but if I'm skipping tretinoin, I apply it at night as well.