To preface, I don't have a lot of natural lashes in both length and volume.
While the formula of this mascara is good and definitely gives me length and definition and lasts well, the brush is tricky if you don't have a lot initially to work with and can clump easily. For lashes like mine, a small slim brush such as Benefits They're Real is much better.
I have tried many mascaras, which often tend to make my eye lashes look cakey as if they have mascara piled on. However, this is the first mascara I have used that doesn't do that or crust off little pieces onto my face. It gives length, volume and deepness to the lashes which I LOVE. The only negative would be that it is not water proof so any rubbing instantly smudges it off onto the face.