I just received this large size Dior Addict to replace a smaller size that was almost gone & came from a perfume store, so I'm sure it was authentic. I compared the two having been warned by the prominent negative review that this Dior is fake.. At first I noticed a difference in the scent but now as I compare them further I do not. It may be that my body is processing the new bottle the same now. I think there can be a small difference in scent because like baking a cake, the recipe can be identical & change a little from one mixing to the next. The new perfume hits your skin & is heated by your body temp & a new bottle can react a little differently till your body starts processing it the same way as the last bottle. The more I wear this new bottle the more it seems to smell just like the last bottle that I know is authentic. So far I am trusting this product & I saved $12 buying it. My only criticism is how long it took to arrive which was probably within the time promised, I didn't keep track, but it seemed I waited so long.