I must tell you to click the on the Naruko Website for all the information you need about this product. It has been a truly effective product in balancing the oil and hydration level of my skin by gazillion times than how oily my skin previously was.
Though it is not something that keeps my face pimple-free, it has been truly amazing at 'cleaning' up my pores, and reducing the size of the pores too especially at my T-zone area. Kudos to the impeccable power of Tea Tee Oil with anti-bacterial effect, it has been bringing magical wonders to my big pores! (For the record, I have enlarge pores since puberty because of acne, now is getting thousands times better honestly).
My tips for using this is to really massage in the watery essence into the face until it is completely absorbed, and where there's acne prone area, apply this serum oftenly (3 - 6 times a day, be consistent with it), works great too like a acne gel for me.
One downside with this serum could be that it is not a good primer for makeup, when I over-apply the product (like 3 or 4 pumps of it). Somehow, when I try to blend that BB cream/foundation on my face, the rubbing motion of my fingers would wipe away the essence leaving my face looking very messy with eraser dust like a messy table! It however won't be a problem with makeup if you use less of the serum, don't be like me who get too indulge with the Tea Tree Oil scent yea?