TL;DR: AMAZING for hydrating skin and good product specially for oily skin, dry skin types may not like.
Texture: It's super watery and when you pour it, it feels just like water but when you start working it into your skin you can feel the slight viscosity of the product.
Finish: Leaves a healthy glowy finish on skin
My experience: As someone with oily skin I'm usually skeptical of trying purely hyaluronic acid serums because they often make my skin feel greasy. But not this one! The light version of Hada Labo Gokujyun is super watery but absorbs very well into skin and leaves your skin feeling like it just drank a gallon of water. It even leaves a slightly glowy look. But keep in mind that this is supposed to be applied on damp skin and sealed with a moisturiser on top to gain maximum benefit of this product.