This is a really great one and done serum/essence if you like a simple routine. It takes care of many skin issues with a boatload of great ingredients. I can't say effectiveness of the product yet as my skin hasn't been that problematic lately, I haven't got acne in a while but I did get two cystic spots and it seems to be clearing it a bit quicker than usual, but nothing too life-changing or noticable. I really like how light the texture is and it dries down fast with no stickiness. My usual snail product is the Cosrx Snail 96 and I love that stuff, it's been the longest product that I've used in my routine and I wanted to try something else as recently I went through a bad breakout (probably from me using too many products) and it made me want something better and more effective for my skin. I think both products play different games, the Cosrx one is just straight up snail while this is more of a serum feel with a good amount of ingredients so it just really depends on what your skin wants. I hope I see some better results in this product as I use it more. I am liking it so far but I don't see myself right now having the urge to replace this permanently in my routine over the Cosrx one.