I've used some acne treatment with salicylic acid daily since I was a teenager. I want something that works quickly. That works to get rid of the spot within two days. If it doesn't do that it's not worth it. Who wants to deal with a zit for more than two days??
Very honestly I have been applying this to a couple spots for about three weeks and will probably be applying it for another couple days.
It's light, so probably good for very sensitive skin, which I don't have. But really, I'd rather get rid of the spot and then have an area of dry skin, than have a zit. That's just my opinion though.