I bought this beast twice and twice I have been in love with this. This gel-based weapon is used to target and fight, existing pimples and blemishes. Salicylic Acid as an ingredient is used, so I do recommend it to use it over-night, because of its drying effects.
However, rest-assured just because it uses acid, it does not necessarily mean it is harsh. A little goes a long way. Cucumber and apple is combined to negate any scarring and hyperpigmentation. Though, it does not completely rule it out, you might still get some scaring like I did.
For something so tiny, it is a potion of awesomeness. I found the next day, the redness reduced and the inflammation eliminated. Worth it!