Le Métier de Beauté is on the top of their game.  For luxury cosmetics, you can’t go wrong with this brand.  I can find counters in Austin, so the privately held company has really rolled out their products from the uber-exclusivity just a few years ago.   While the price point really demands excellence, you will get it.  The liquid liner in a pen format brings loads to the table.  It is very easy to travel with and even easier to apply.  I lay down the quill-tipped applicator along the lash line.  For a bolder eye, I just use a heavier hand and draw a dramatic line (or cat-eye).  There are some gel eyeliners that have a longer wear, but this product makes up for it in ease with no need for pots or brushes.  And if you allow the line to dry for a couple minutes, the liner is completely smudge-proof.