I love this, it is my new favorite liquid liner! The pigment is strong but what I love about this most is the brush tip: The brush tip size is perfect for getting super close to the lash line and not making the line too thick - perfect for those of us with hooded eyes and eyelids. The bristles are super fine and stay together so it doesn't fray at all (just be careful putting the cap on to not separate the bristles). It's so easy to make a really fine or baby wing which again, for those with hooded eyes, you know the struggle of wings! It's also easy to use for a standard wing as well. Once it dries, it stays put, which I love as I have oily skin and even most "waterproof" eyeliners will eventually start smearing half way through the day - this doesn't. Just makes sure it dries down completely before touching it or curling your lashes or it will smear then it's a problem cuz it won't move (ask me how I know 😅). It doesn't flake either and comes off easily with micellar water. Haven't noticed any benefit as far as lash growth due to the lash growth serum it promotes but I also don't have the best lashes to begin with, so who knows.

Love this eyeliner! Goes on smoothly and stays all day. No itchy and watery eyes —I will purchase again.

I've worn liquid eyeliner every single day since I was a teenager, with dry skin and oily hooded eye lids (helps to powder them a bit of course), and this one, the NYX Epic Ink, Stilla (not much in there though), KVD Tattoo, and too faced better than sex are the most effective liquid eyeliners, with this one actually lash boosting (I've gotten comparable results to pure lash serums). I've gone away from it to try other formula for a while but keep coming back. Make sure you shake it well, and it does start to thin at the end of its life.

I've been using this eyeliner for the past 4 years. It stays one very well and doesn't smear. Super happy with the formula and would recommend!

I had used the product before. However the black ink just came out everywhere and everything was a mess on my ink-filled hands. I think this product is defective I had to throw it away.

Holy grail! I have been searching for the sharpest and inkiest liner and finally found it! Thank you PF for making the best!

I don't care for the water proof and its way to dark. I thought I could use black but brown color is all I can use. It is terrible that everything has to be in black. I think it is biased.

I LOVE this eyeliner! It's waterproof! It's super slim! And the product is gorgeous! I have always loved physicians formula. And I will continue to keep this brand in my makeup bag. I one hundred percent recommend.

I chose this Physician's Formula Super Slim Liquid Eyeliner for my cat-eye make-up which is a staple of my signature look. I love how precisely I can apply the black liner (the proper color is Blackest Black). The brush tip is ultra-fine and easy to glide along my lash line. I love that it is waterproof so I don't have to worry about my look getting ruined in the rain or humidity. I absolutely love the packaging of this eyeliner with the clear bumps of water that dot the various sides of the applicator.

I love this eye liner! I have a difficult time trying to find an eye liner that goes on smoothly and that doesn't smudge!! This one has all of the perks! It is smudge proof with all of my eye shadow and it's a smooth line!