Product: Missha Time Revolution The First Treatment Essence Intensive Moist
Skin Type: Dry flakey skin in the winter, occasional breakouts, and combination skin with oily T-zone in the summer

I finished about 8/10 of the product, and I can say that within the first 2 weeks of using it, I noticed how glowy, smooth, and elastic my skin was. I use this immediately after I cleanse my face, then follow up with a hydrating toner. Even at this stage where I am almost done with the product, the great results are still visible.
In comparison with the COSRX Galactomyces Whitening Power Essence, I would say that the Missha one does a better job at giving the glow and maintaining the results of a healthy looking skin.