I use it. It's not a miracle as Paulson said but its by far the best acne breakout minimizing program I've used.
If I ever breakout (which is usually never, only a few pimples here and there) I just use the benzoyl cream they have or if its bad I use the repairing mask.
It's very expensive, other people can point to you over the counter remedies that can be a fraction of the cost of Proactiv but I don't mind the cost.