I always have this at my home and would carry it to my trips too. It saves me from a pimple disaster by killing it so quickly. I'd apply this at night and by the next morning, my pimple's gone or reduced its size.
This product is great for those blind pimples (i.e. pimples residing under the skin). It definitely reduces redness and the size of the pimple after just one use. It does, however, rub off in the night on pillows, and it is difficult to remove the remaining residue in the morning without irritating the skin. I have not seen this product having any effect on whiteheads or more noticeable pimples on my skin. For the price, I would expect more.