I have already had some treatments at a beauty therapist and was very happy afterwards. After much back and forth I decided for this set, after I had already known the procedure and application, the application was for me at home easy. But even for beginners is just as well to recommend this kit, the accompanying booklet explains everything very well and if you stick to the respective steps can really happen. Important for this is the facial cleanser without soap, I've used it a wash lotion from La Roche Posay, this is pH-neutral and without soap. As I have already tried the lower dosage to the beautician, I started with the same 20% - the brush application is simple, you really need some of the fruit acid, because the skin is supposed to be only slightly "wetted" by the acid. The time I stop with my smartphone and after the given exposure time I spray neutralization directly on his face and wipe gently with cotton pads over. After neutralization, I also always use a cold compress, here I'll just take a small towel and dip this into the deep end and put it for a few minutes on the face, which reduces the redness and cools the skin thereafter. Then I apply a moisturizer that's it!