Love this product! Mind you, it is not an overnight miracle worker but it does improve the appearance of darkness caused by acne scarring. I used to apply this product over my entire face but found it ineffective. It is better used as implied, which is specifically on your dark spots as a spot treatment. I have noticed that darkened areas have been lightened within 3-4 days of applying it morning and night (@ night i usually keep it on overnight). Not sure if it will remove the scarring completely, but by the results i've seen so far, its defintely worth continuous use!