This product has been made by a lot of companies, but is sold for about the same price (priced competitively), so it's kind of a tried and true acne treatment Kate is keeping alive by having as part of her line. It's essentially killing bacteria and drying a pimple, whitehead or blackhead with alcohol and sulfur. MAKE SURE YOU DON'T SHAKE IT, and let it all settle with the pink at the bottom before using it. Then using a cotton bud (longer ones with one cotton side and a longer stick work best but may be hard to find), dip the tip all the way down at least enough to fully submerge it in the pink sulfur/clay at the bottom, and then smoothly pull it straight back out of the bottle. then, dot it on your spots. If you let it dry all the way, it should tighten pores, kill bacteria and reduce pimple size and inflammation overnight. it also can be used in extremely thin "painted on" layers if you have oily patches. Because it is a light pink, applying a very thin amount should be able to be hidden decently under a powder foundation during the day if needed.
The only reason I didn't give this 5 stars is that is is not a new product, other brands do make this and I remember my mom having the same thing by one of 3 other companies I have seen with this in their lines, and Kate's version is the same, just with a nicer label. It isn't for hormonal acne, and relies on drying out the pimple and killing germs and does not contain any more innovative ingredients like the rest of her acne line does. It also does not help with discoloration or anti-aging the way her line normally does.
It is still a good product, and the similar products have a similar price, it is just better for oily skin acne sufferers like teens than something for all skin types.
Using the second bottle now. I use this every night and it works well in clearing acne although it does not really prevent new breakouts. I have sensitive skin and have used acne treatments from other brands that not only completely dried up my skin, but caused even more redness, irritation, and burning sensation. EradiKate Acne Treatment does not give me that problem as long as I make sure I apply it to the bigger acne first so the smaller ones would just be covered by a thin layer.
I was using the Mario Badescu "equivalent" for a couple years, and then one of my friends told me about Eradikate. And WOW what a difference. In this product, there is much more sulfur than the other, which immediately dries any new pimples. It's the perfect spot treatment and is very effective!