The Refining Mask has to be Proactiv's best product. You can use it as a standard mask but it also serves as an overnight 'emergency' treatment. If you have a problem area, just dab a little and leave it on overnight. When you wake up, the pimple or blemish is smaller and easier to cover-up. If you do it over a couple of nights, it's generally completely gone by day three.
My husband uses Proactiv and has for almost two years now. He was on Accutane twice and both times it came back! (That's evidently rare, especially since he is now in his mid-thirties!) With Proactiv, his face is always acne free. He travels with their little mini-maintenance kit since the normal bottles are too big to carry on the airplane. He used to be really self conscious going into meetings as the head of a non-profit, but now he doesn't give it a second thought.