Pros:
-Brush is good
-Staying power is good (after everything is done)

Cons:
-WEAK pigmentation
-Formula comes out like watercolor
-Because of above, application is long and tedious

I was super excited to try this eyeliner and it is a disappointment. I'm not a newb with liquid application but the formula that came out was just so watery and ugly. The instructions do say to shake it before application, but I could shake it till the cows come home and the result would still be the same. I tried using it on 3 separate occasions but got the same mess. I chucked this at the bottom of my drawer and completely forgot about it till now (1 year later).

Turns out you can get a really nice, solid line when you layer it and not pull the brush through. I'm not sure if that makes any sense but I basically blob a ton of product on, then smear it out. The only thing that sucks is letting it dry, then do the smear and pull, let that dry, and do the smear and pull again. It's a really messed up way to put on the liner but it works for me. Only when I do that it gives me a nice, bold colour and I can actually wing it, and looks like normal liquid liner. The staying power is pretty good and it looks really nice but 10-15 minutes for eyeliner is a joke to me. I'll use this up but I'm never buying it again. All I can say for Chanel with this one is wtf?

What a waste of money for a dissapointing product! My first liquid eyeliner and I thought it would be easy to use. The tip which is like a brush is hard to use and apply correctly. The colour is weak especially over eye shadow and it doesn't dry easily. As a result it transfers on my browbone when I wink. I prefer the eyeliners with a bold tip which resembles to a marker. I never expected such a product from chanel.

I splurged when buying this eyeliner because I thought a brand like Chanel would be worth it and i've been looking for a good liquid eyeliner for a while. Well, I did not like this eyeliner at all. The liquid either didn't come out enough or came spilling out. And when I finally got the right medium, it did not go evenly on my eyes.

Disclaimer: I didn't purchase this product; my boss gave it to me after *she* bought it and found that it irritated her eyes (we both wear contacts, but it didn't irritate mine, even though my eyes are more sensitive than hers).

I don't really like this; I have it in a charcoal colour, which is nice (but I prefer black). The brush tip is not great; it's too flexible, and since you have to keep "clicking" the end to get more product out and consequently have no real control over how much product is on the brush, it's really difficult to get an even line.

Won't be purchasing.

I bought this on an absolute whim in the Hong Kong airport. One of the worst whim buys I ever made!
I've never been able to wear this out of the house because of the difficulty in application. The liquid comes out in dots and dribbles and doesn't soak the pen brush right through. When I eventually threw this away, half the brush was still white in colour. =.= And believe me, I once tried waiting for 5 minutes to see if the dot would soak through. It didn't.
The liquid tends to form in a huge dot on the brush when you click-turn the dispenser once (just once!), and it's nearly impossible to apply it accurately precisely because the dot is so big! Also, the amount of ink that comes out is irregular. I always ended up with more ink on one eye than the other, unless I drained some ink off the brush with a tissue paper first - which was such a messy and fiddly thing to have to do.
Also, the colour was extremely weak, and I had to keep going over it to get a black (as opposed to greyed out) line. I would expect it to flake during the day if I'd managed to wear it out - I had to apply such a thick layer of liquid to get a black line!
I threw this away after 10 failed attempts to use it. Such a waste of money!

Update: I find that it dries up fast (in the "pen"). I haven't used it that long (so I cannot have used it up) and I always put the cap on... So I give it 3 instead of 4
I now use gel liner with a brush instead (Sigma - E10 Small Eye Liner, which is pretty similar to this eyeliners tip.)

Original: This is the only eyeliner I can get perfect everytime, and I really suck at eyeliners!! :) The tip is very "pointy", so I can get a very fine line if I want to, and a thicker line if I want to. It dries fast on me. Too bad it is so expensive. But I don't have to buy a new one so often, so I will survive :)

This is my all time favorite eyeliner. HG all the way!! I've been using it for a few years now and I can't go without it. I agree with some of the other reviews that said that there is an uneven amount that comes out when you click it but I've used this liner for so long that I've learned how to get just the right amount. I don't turn the bottom all the way, just half way and I have just the right amount for my upper lid ( I don't line the lower ). It stays in place all day without smudging or flaking and the pigment is the perfect shade of brown. The only con I can think of is that there's not a lot of warning before I run out of liner. It's not like a pencil where you can tell when you're at the end. I always have a 2nd one on hand for when I run out. I think this liner is worth every penny.

I agree with gigiberry on this product 100%. Im a huge fan of liquid eyeliner, and my HG has always been lancomes artliner- the l'oreal version is a great alternative by the way. I was at the airport and had some euros i wanted to spend and came across chanel counter. I bought this liner as well as the kohl black pencil and i dont like either- waste of money considering one is already in the bin after 3 days (this one!). Too much product comes out, you cannot control it. With my artliner it takes me 30 secs to do both eyes and i get a beautiful precise line, with this it looked a thick mess. I had to keep going over it too, the colour was so weak. I was expecting something amazing from this liner but its in the bin waste of space (and money.....)

Sadly I did not like this. I am a liquid liner fiend and usually wear a subdued pinup eye everyday so am always on the hunt for new liquid liners. Unfortunately, this was a disappointment. First of all, you cannot control how much product is dispensed. One click would often have the liner oozing out, which would result in a lot of product waste and messy application. It didn't apply smoothly and I often had to go over the line several times to get a true black line. It also flaked throughout the day. L'oreal's lineur intense liquid liner on the other hand is fabulous!!

I just bought this eyeliner when I was in Hawaii, I've also used it about 3 or so times when I was in Hawaii. I application is not that hard considering that this is a liquid eyeliner. I shake the pen and turn it once or twice to start the ink flowing, it is easy to make a thin line, this is the first liquid eyeliner that I've used that I can draw a thin line on my lower lash line without looking like a clown. I've bought black since the brown appear too light, I would draw the lines on the upper lash line overlapping a couple of times so that I color is dark enough. The eyeliner stays and last all day without much smearing if I don't touch or rub my eyes. Beware though that this eyeliner is not waterproof, so if you cry or use eye drops, the eyeliner will fade or smear.
Update: when I first use this eyeliner, I also used an eye primer underneath, so the liner lasts longer, but since using this eyeliner without a primer - it doesn't perform that well, the liner still fade and smear after more than couple of hours, for the price that I paid ($34 and tax) I expected this liner to be alot better than all the other liquid eyeliner I've used ( which is lancome artiner, loreal liquid eyeliner, revlon, etc), the lasting powder is not better than lancome artliner but the only think I like this better than artliner is the application tip - more stable than artliner, therefore, I can draw liner at lower lash, whereas I can't with the arliner, but I don't think I'll buy again for $34.