I've been using Cap for a little over a month now and I've concluded that its good stuff, but not a miracle. Their guarantee should say it "improves" acne and leave it at that. My teen daughter and I use it 3xs a day (and leave it on each time for apprx a min before rinsing). We both still use BP at night and our moderate acne looks much better. But realistically, this is ONLY a wash and as we all know, a mere external wash cannot do much for a condition that originates internally. I hope they will create a lotion that may be more penetrating than a wash. I give it a thumbs up as an excellent wash that improves moderate acne. I doubt it could help w severe and I bet it would eliminate mild acne. Also note that my daughter and I still use BP at night. I tried a few days w no BP and only the wash, and I had a break-out, but not as bad as it would've been w/out Capsiderm. I would recommend this product as a good addition to a skincare program that includes a topical. My daughter is having a lot of success using Capsiderm, taking Minocyclin, reg facials, and BP at night. After yrs of fighting my own skin, I'm convinced only a consistent effort to keep it at bay, a variety of products and a healthy diet can yield results. The exception is something as strong as Accutane. Best of luck.