The things that I really like about this lip liner it the shape of the applicator. It is angled so that it's easier to reach the corners of my lips, and create thick or thin lines easily.
Just twist the bottom to release the liner, no need for a sharpener.
The liner itself is highly pigmented. This shade that I tested. Double Dose is dark and noticeable against my dark skin.
I didn't necessarily feel that it makes my lips look plumper, even though it has ginger and capsicum in it. I also didn't notice a tingling feeling from these spices when I use this lip liner. I feel that the shape of the applicator allows to give a more plumped look rather than the liner itself.
Other plus points are:
It's long wearing
Cruelty free
Vegan formula
PETA certified