Super economical. Have used it for a little over a month (2 users, myself and my sister) - often 2 times a day, and we've only managed to deplete the amount shown in the photo. Noticed my skin is much clearer, brighter and smoother after using this. Will probably not purchase again for myself, but my sister loves it! (The Missha galactomyces essence gets me better results - hence the 4 star, but my sister has seen more improvement with CosRX) Give it a try and see what works better for you.