The good thing is that it gets the job done, but don't expect the cracks to disappear completely, they become more "smooth" by 60%. And the best thing is that it stops spreading, as it is now smooth to the touch. In the times it mentions, add +5 minutes. (watch video on youtube). As for the negatives, since there is enough liquid for at least 3-4 applications, it only has one sticker. I applied it directly to tiny cracks with liquid and with the plastic and left it in the sun, it became smooth and I believe it protects.