This is absolutely waterproof. That being said, it is not oil proof, I used this on a really hot day, and it stayed...but it also smudged, even when I put powder eyeshadow over it. I think that this might be more conducive to the waterline, as it stayed really well, due to the pigmentation, but on a day that your eyelids might be oily, you're going to need the full eye prep: primer, this, shadow - and even so, after 6 hours it might smudge. All in all, not bad. The product itself does dry out though, but microwaving it will fix that, and its still usable when it dries a little.

This is absolutely waterproof. That being said, it is not oil proof, I used this on a really hot day, and it stayed...but it also smudged, even when I put powder eyeshadow over it. I think that this might be more conducive to the waterline, as it stayed really well, due to the pigmentation, but on a day that your eyelids might be oily, you're going to need the full eye prep: primer, this, shadow - and even so, after 6 hours it might smudge. All in all, not bad. The product itself does dry out though, but microwaving it will fix that, and its still usable when it dries a little.

Not a fan of this eyeliner at all. It smudges easily and doesn't stay put the way I'd like. At first I thought it was because of the brush that came with it, so I started using it with another angled eyeliner brush and it was the same story.
If you're going for a "smudged" or smokey eye look then this can surely give that effect but, if you're going for a clean and precisioned look then steer clear!

I love maybelline as stated many times, so of course I tried there new product... It wasnt worth my money and I had a $1.00 off coupon. The black is DULL and eventually doesn't keep going on so smoothly I love liquid eyeliner so maybe it just does'nt effect me as much as a good liquid eyeliner the darker the better.

I found the product gave me less-than-dramatic results. I was very unimpressed, and never bought it again. It wasn't the eye-popping black I expected it to be. I'm also not a fan of the separate brush; very hard to transport.

The price of this product is great but the quality in not what i was expecting. When i put it on in the morning it didn't even last a few hours before i have to re apply it. But it does go on very smooth

I purchased this eyeliner one day in the purple colour, when I was out of town and forgot my regular Bobbi Brown gel liner at home.
I purchased this on a whim, thinking "ooh, purple colour, it looks dark and nice"
nope nope nope!

I found this gel to lack pigmentation, and when I applied it onto my lids, it took several layers until you could see the purple line.
This product also smudges easily and I get the feeling that it's more of a fluid than a gel when ti goes on my lids.

I did love the brush however, and have been using it for my Bobbi Brown gel liner...it's very smooth, and since I love light, thin brushes, i fell in love with it immediately.

All in all, i would say the price was worth it (for the brush)
i may want to use this liner as a gel eyeshadow one day, and kind of smudge it all over my lids. Since I have no crease on my eyelid, I don't think i'll have to worry about it creasing or falling apart later on in the day.

I was not impressed by this gel liner. Application takes a little while to get used to and is tricky at first, and this is coming from someone who enjoys painting. I may use the brush if I happen to find a better product because it is quite nice, but this product doesn't do it for me! It looks nice and matte upon application, and is very pigmented. I found that it fades easily throughout the day, and transfers from my lash line into my crease. It may just be the shape of my eyes, but I have never tried another eyeliner that transfers onto my eyelids, so it was a strange finding. I tried putting on primer first, and wearing it with eyeshadow, but no matter how much I put on, the transfer still happens. I will not be using this product anymore, as there are many other great products, which are easier to use, that I don't experience any problems with.

This eyeline smudges too easy. It does not stay on all day!

I bought this eyeliner over the weekend after I saw some girl doing a makeup tutorial with it on youtube. I didn't believe the smudge proof part so i painted some on my wrist and surprise surprise, it smudge to a certain extent. So now the real world test. First I curled my lashes, put on the mascara, let it dry and proceeded to paint on the eyeliner. It was a very smooth application but I needed to add more to the brush as I extended towards the ends of my eyes. I found out it wasn't a cry proof, but my mascara was. This eyeliner is not what it says, ie. waterproof and smudgeproof - NOT. BUT it is an average eyeliner and it works like any other manual eyeliner application, as long as you don't cry and don't rub your eyes.. you're good to go.