Disclaimer: Product featured was provided for review.
The fine tip felt liner is truly one of the thinnest I have tried. The tip isn't too stiff or flimsy, allowing me to draw on smooth and thin lines. I noticed that the liner does deform a bit after repeated use so make sure to alternate how you hold the handle as to avoid having a bent tip.
The shade "Black Out" (the liner is also available in "Mahogany Flame") is a simple bold black. The liner takes a bit long to dry so make sure to brush off the excess product at the rim of the packaging before applying. Once dried, the liner has a matte, powdery finish that's not quite smudge-proof. When I gently rubbed my finger over the liner, a lot of the pigments transferred.
I wouldn't recommend this for the hot and humid summer weather, or for those with oily skin as the formulation is not water or oil-proof and thus will smudge during the day. However, I do like the fact that the liner doesn't shrink and become crusty when it dries, which is the case with a lot of liquid liners.
I really love the ultra-thin felt tip applicator, it works almost as well as my angled eyeliner brush (and that's saying a lot given the fact that I haven't gone without my angled brush for almost a year now)! The formulation I don't love as much, the powdery finish is not resistant to water, sweat, tears, or oil, so for someone with oily skin living in one of the rainiest cities in the world, it's just not going to work.
The new ColorStay Skinny Liquid Liner is available Canada-wide starting May & June 2014.