Works like retin-a but the side effects (Irritation, initial breakout, dry skin) are less severe. You can put micro on right after washing your face unlike regular retin-a you would have to wait 15 minutes. It's more effective. But I heard people saying that even though you use retin-a or retin-a micro, sometimes your acne still comes back.
www.absoluteacneinfo.com Great site filled with many people and many topics about anything you could ever find about acne.