The texture of this gloss is great as with the other Dior Addict glosses I own. It isn't sticky or tacky so it feels lovely and smooth when you apply it. You definitely feel a minty, tingly sensation about 10 seconds after you apply it. It smells good which is unusual for a lip plumping product because they normally smell incredibly sickly and sweet. I love the colour which is a pale milky pink with the slightest hint of shimmer, but it applies quite sheer to the lips so you get this super volumising effect with a natural look. As for the actual plumping effect of the gloss? Well, it definitely increased the volume of my lips a little bit but it didn't make them overly swollen or irritated. This isn't going to give you Angelina Jolie's pout, but it will slightly improve what you have naturally.
The plumping effect lasted for a good 2 hours after I applied it, but obviously you would be re-applying this product as you would any other lip gloss. This gloss feels moisturising so it won't make your lips dry and flaky in the winter months. As for the product re-defining your lip line and helping to plump your lips even when you're not wearing it after a 15 day period? I have been using this for around a week and I've noticed that my lips are slightly plumper so I agree with that statetment but if you are looking for a really dramatic change, then this may not be for you. It's subtle so I don't think anyone else would notice except for you.