I love the pen and how it can be used for two different lines: thick or thin. It goes on so smoothly also

I was expecting a lot when I bought this, but this was a let down.
The pigment was alright, not very dark nor very light. When I was applying to my upper lid, the chemicals in the marker, made my eye sting a bit and was watery. You, also can't use this for tightlining nor waterline- pigment won't even show up and it will sting your eye even if it's not touching your eye.
So this product won't go to waste, I apply this to my upper lid after I apply my pencil eyeliner. It makes the eyeliner darker and it makes the color stay longer. This product is kind of a stain. But it would be unnecessary to go over it if you're using liquid eyeliner.
What a waste of money. I really need to read reviews before buying

No -- this doesn't work on waterline. I thought this would make it easier without going to the gel/brush route. This liner has no density. Also, is not waterproof. A disaster!

I will stick with milani pencils or revlon liquifeye. Or, back to gel.

I thought this would be a great eyeliner before I bought it.

But it didn't work for me at all. The color pay off was really bad, the line was extremely uneven.
I don't know, maybe it's me, but I couldn't handle this product at all.
Definitely never going to repurchase again.

I bought it, thought it was okay, then after a month, I thought it was all dried up... You have to press really hard to get the colour to come out... Not great.

This looks and smell like a permanent marker. The tip is rather think which makes it difficult for thin lines, and the pigment is not very dark. You have to draw over it a few times for good coverage, but the awkward tip makes it difficult to maintain a good line.

I was very lucky I didn't spend any money on it(I got it free with my mascara).

I like the concept but it didn't quite work out with this, it literally feels like I am putting my eyeliner on with a sharpie. It smells terrible, hard to apply evenly with the tip I found, very watery. I wouldn't recommend this to anyone.

Love love love love love!!!!! If I could marry an eyeliner, I have found my match! This + Urban Decay Eye Primer + ANY eye shadow + L'Oreal Collagen Mascara = I don't have to touch up my makeup at all, all day. Seriously, it's a gold mine. I am in love and so very happy I have found this amazing piece of tiny machinery!

UPDATE: Sadly, I'm no longer as happy with this product as I once was. I am now using MUFE waterproof eye pencil in black and using a smudge brush to work it into the top lashes. This gives me a more natural daytime look. I may hold onto the L'Oreal marker for nighttime looks, but am generally reaching for eyeliner gel pots in the evening to increase the eye "drama".

I've had the same issues a lot of other reviewers have posted, but wonder if anyone else has had an allergic reaction to this eyeliner like I have? It took me twice to realize it was the eyeliner causing it...I must have gotten it in my eye when applying, my eyes started to itch & sting and within minutes it looks like I've been punched in the face. The entire insides and area around my eyes swells up like a balloon. The swelling goes after a day or two with rinsing them repeatedly, but the irritation lasts all week! I will NEVER buy this product again. continued >>

I think I'd get better results from lining my eyes with a crayola marker. This is one of the worst eyeliner pens i've ever used - goes on choppy, uneven and has very weak pigment.