Lengthening: I would say is lengthening but not to an extreme. I have somewhat long lashes already so it didn't bother me much.
Curling/Lifting: Yes! I don't know how, but this mascara does lift and curl the lashes. Making them appear more open. It may be due to the brush (more on that later in this post)
Volumizing: This definitely adds on some volume to your lashes. But because of this, a second coat makes lashes appear "spider-like". I just pile it on wet, rather than letting it dry before the second coat and that seems to help. But even then, if you put too much the spider effect can still happen.
Separating: This one is 50/50. If you only do one coat than it does an amazing job. BUT any more than one coat the lashes start to have the opposite effect, clumping to each other. As for me, its hard to resist a second coat of mascara.
(One coat - did not use eye lash curler)
My over all impression of this mascara is that its a good one but not fantastic. Especially for the $22 price tag. It's waterproof so its also hard to get every last bit off. As for repurchasing, I think I can find and equivalent or better at the drug store.