I want to note that I have not yet received it, as it is coming from Europe, but I will comment why I ordered it based on past experience with this product.
I had always had small eyelashes, to the point there were times I used faked ones. When I bought the first bottle, maybe a decade ago, my eyelashes seemed to get longer. No, they do not look dense, or long if I am not wearing mascara, but with mascara my eyelashes look amazingly long. I still keep an old bottle around, and use it once it seems that my eyelashes do not seem as long as usual.
The only thing I do not like is the way it is presented, seems like lots get trapped inside the bottle, I had managed adding some water in occasion, I do not use the applicator, as it gets the liquid all dirty, instead I pass it on my finger and apply.