It is pretty expensive for an eyeliner but it does do as promised - stays all day! I have applied this in the morning and had it still look fresh by the end of the day. No smudges, running and no "raccoon" eyes either.
It is very pigmented, you only need to apply once to get a good amount of product on your lid. The black also stays looking "wet" even though it has dried, it doesn't flake or feel heavy.
It's very easy and smooth to apply, the tip is small and you can get a really precise line and it's easy to go over and get thicker line if you wanted. I do agree with some of the other reviews, the tip does fray fast but for me, when the tip started to go I was pretty much out of product already and it was beginning to look more dark gray than black. I also had no problems with removal but I do use higher-end removers, so maybe you would need to get a really good remover to dodge any troubles during removal and avoid any possible irritations and excess rubbing.

Easy to use eyeliner that stays on all day without smudging. What else can a girl ask for? Price could be better but I usually wait for deals at Shoppers Drug Mart to purchase my Stila products. Definitely recommend this product!

I use the Stila Stay All Day Waterproof Brow Colour for my eyebrows so I thought I would try this out since I absolutely love the brow product. It definitely does what it says and stays all day, however I did find it a bit hard to remove. The applicator was good but I don't find it that different from other liners (like Kat Von D tattoo liner). Overall I did like using this but I probably won't repurchase because there are liners out there that do the same thing for less money

Many people love this eyeliner for its ability to last a long time, but for me this did not work at all. It smudged and gave me "panda eyes" in no time flat. Granted, I have the perfect storm of conditions (oily, hooded eyelids) to challenge any eyeliner's ability to last more than 2 hours, but I have definitely found a few that will do much better than this one, especially for the price.

Very smooth application, pretty decent precision. Rich black colour. Long lasting colour with no fading or cracking. I would buy this again but I still prefer Kat Von D products.

The felt pen degrades after awhile of wear and tear, but that's par the course of eyeliner abuse I bring to the court everyday for winged eyeliner. Stila's a fantastic eyeliner that i've had the luxury of purchasing after failed drugstore brands that washed out into corpse grey lines and dissolved into dust after the first usage. Definitely buy this eyeliner! It lasted me easily almost a year and the lines are crisp and black. SORT-OF waterproof, but juuust enough that if you don't rub your eyes in the rain, we're good.

This is my GO TO eyeliner! It may be one of the more expensive brands, but that just means that you're paying for QUALITY! Not only does the product itself last a few months before running out (and I wear nearly every day), but it is also long lasting, TRUE waterproof wear. Heck, you gotta scrub this stuff off your eyes to get it off at night, you could cry a river so deep Adele will be rolling in it and your wings will still be ON POINT! Speaking of on point, the brush tip is a dream and makes those thin precision lines so much easier. Say goodbye to eye poking and raccoon eyes, this will be your new BFF like it's mine.

Although it is the most expensive eyeliner i tried yet, i can easily say this is the best one. The color is jet black, it glides on skin leaving an intense line that stays ALL DAY. Seriously. It does not smudge and stays beautiful for hours!

I received this as a Christmas gift two years ago, and haven't used another eyeliner since! I love the precision you can get with the felt tip, HOWEVER the one thing that I dislike is that it tends to fray before the tube is empty. Even if you're inexperienced with makeup, this is the eyeliner for you! It's very pigmented and 1-2 coats is enough to last all day without smudging or smearing. I've even fell asleep with it on, to wake up the next day and it still look perfect (Not that I suggest doing this).

Taking my 5 yr. old grandson swimming has always been a test for my liquid eyeliner. I have tried several brands, some of them very expensive but invariably find black streaks running down my eyes in the pool. Of course he laughs at it BUT I don't. I never leave the house without makeup and now STILA STAY ALL DAY WATERPROOF LIQUID EYE LINER has fulfilled my dream of finding a non-running eye liner. Thank you! Great bargain for this efficient product.