updated:i bought this because my lips are the very thin type. i saw pictures of how well it worked, and also i liked the fact that it improves longterm plumpness, meaning, even after you completely stop using it.before i bought this i think i was afraid, or skeptical because of the ratings. i did a lot of research of others. i found 1, that was also affordable to keep buying. but i should of just got this first. i bought it a few days later. i wanted more sting, even though the one i bought first did have some sting.i knew it would sting, and i wanted it to, because that shows that it is working. i wanted this amount of sting. yet, after the first few uses, i got use to the sting. the sting is nothing to worry about ever. dont be afraid. id rather have a product like this do what i need it to do, then to not feel any sting at all and it not work, or work too slow.it works fast. on each use. after a week i felt so comfortable that i stopped using it, which should mean a lot. i still planned to continue plumping, because i want even bigger lips. so i will like put some on every day for another week, and then take another step back.this bottle is worth the price, because again, the plump is longterm, even when you stop using it.