I used Proactiv for a month and it didn't help at all. Maybe if someone washes their face with soap and never moisturizes and doesn;t use ANY products, and then starts using Proactive, it will make a difference, because you have your cleanser, toner, and moisturizer. But it didn;t help me at all. Using ANY brand of cleanser, toner, and moisturizer (acne fighting or just regular skin care) will work as well as Proactiv. And personally I haven't tried the Neutrogena Acne System, but I like Neutrogena overall. It seems more natural, and my dermatologist says it's good.
Here are some dircetions on how to use it
Soap - The Acne cleanser
You should use this product day and night if you have acne. Squeeze a pea-sized amount into your palm, foam it up with some water and wash.
An alternative would be to wet your face first, rub some product (not too much) into your face, then rinse.
Night cream - Acne control lotion
Do not apply too much of this, as the medication will dry your skin and make it appear red/scaly. Squeeze a small amount onto your palm, dot it evenly all over your face and rub in. Pat it in if you have sensitive skin, and furthermore, only use it on your problem areas if you have REALLY sensitive skin.
Day cream - Oil-free spf 15 lotion
Squeeze a small amount and dot liberally over face and neck. Rub in. The SPF-15 will protect your skin from the sun's UV rays for a short while.
Good luck with treating your acne, and see your GP if it doesn't work as it should.
Try this regime for at least 30 days, be patient :)
BUY IT!!! It is a little bit expensive, but it's totally worth it. My big red pimple became smaller just after 1 use! It's a good emergency acne treatment. Don't buy the other acne treatments. Some of them have 10% benzoyl peroxide, but it irritates your skin! This one only has 2.5 % benzoyl peroxide, but it works just as well as a 10% one. Good luck! You're on your way to clear skin.