I don't have much experience buying any fake fragrances, although I do admit that I bought a knock-off bottle of Polo Blue from Walmart. It's called "Classic Match; our version of Polo Blue". What's funny is that when I compared it to my real bottle at home, they were strikingly similar. I even found that the fake one had better longevity. I figured it wasn't hard to replicate Polo Blue because the notes are pretty straightforward. I don't know how these knock-off companies could ever clone more complex scents though.