I was excited when I saw this product only to be sad when I received it. I tried it out the moment it arrived. I put the primer on half of my mouth to see if there would be a visible difference- none at all. I did not notice any plumping or firming and my lip lines still looked exactly the same. I have used it a few times now (all over my lips and just outside the lip line) and still not noticing anything. I have not yet tried wearing lipstick over it, but I will. The weird thing though is that even after a couple of hours it has the consistency of a lip balm that never soaks in. Not sure how well that will work under a lipstick or gloss. I will likely send the product back if there is any lipstick bleeding.