Cons:
-very hard to take off, even with Vaseline and makeup remover.
-it smudges, even if you've had it on for hours, it'll smudge, especially on your eyelid.
-very messy

I can't think of any pros other than its easy to apply on.

I love how this eyeliner glides on so nicely BUT it smudges like crazy. I was used to a different brand that stayed on forever but this brand gets all over my upper eyelid by the end of the day. And if you accidentally touch you eyes any time during the day it comes right off. The pot does last a long time but I can't stand all the smudging... I guess I'll have to keep searching for a better gel eyeliner...

Definitely my GO-TO EYELINER! I use thicker eyeliner (because of my monolid eyes), so I do have to be careful with smudging and I need liner that lasts all day.

This lasts me all 8 hrs through work and another 4 hours of class without breaking a sweat. It's been thru heat, cold, humidity, and dryness. It does smudge a teeny little bit on the lower-outer corner of my eyes, but only because of the way my eyes are shaped. The brush is nice and precise, you can get a thin line or a thick line depending on how you use it. Other than this, no problems!

I've tried MAC's Blacktrack. They're both equally great in quality. Blacktrack is definitely more "black." I go over the eyeliner twice with Maybelline for it to be super-black. However, for less than half the cost (around $6-7 at my local drugstore), and for how much eyeliner I go through, I will always choose this. I haven't had any problems with the product drying out. Just gotta keep it closed up when you're not using it.

If you're looking for a MAC Blacktrack dupe, this is it ladies! (I just picked up Loreal's gel eyeliner. I will update later after comparison).

This is such a great eye liner! Applies smoothly and in a subtle way.. if you want, you can build it up. The brush is great as well, very precise and easy to use and I am a newbie when it comes to gel eye liners xD
Definitely will be repurchasing this one!

This is the only gel liner I have tried, but it's so good I have no desire to buy any other ones.
The color is very black and the brush that comes with the liner is excellent. It allows for very precise application and is quite fuss-free. I can create bot thin and thick lines and making the wing at the outer corner poses absolutely no problems.
Lasting power is amazing. I have worn it in extreme cold an heat, for 4 or 12 hours and it never even moved.
My only complaint is that it dries out before I am able to finish it. After about 8 months I noticed it was getting hard to apply it and it started to tug on my lid slightly. By 12 months it became unsuable and I had 1/3 left of the product, but I still had to throw it away. I am not sure if the packaging is to blame or the product itself is simply prone to drying out, but I would have liked to use it all up, instead of having to buy a new one before the old one is done.
However, the price/quality ratio is very reasonable so I won't hold this against it.
I wholeheartedly recommend this both to beginners (because of ease of use and the included brush) and more advanced users (because of very high quality).

It works just as well as the MAC Black Track gel eyeliner. It lasts all day, and doesn't really smudge.

The only downside is that it is a little less "black", so sometimes I have to go over it twice.

The brush that comes with it works well. I have a separate gel liner brush, but occasionally I use the stock brush too, and the results are just as good.

Mine is relatively new, so it hasn't dried up yet (like my MAC Black Track), so I can't comment on that. THis is currently my go-to gel liner.

i went to mac to see the fluidline and it was magical but its expensive for something simple. and i saw the maybellines one and bought to try it. and it does exacly the same thing and awesome for smoky eyes if u smudge n blend it. but im sooo glad i got this. :) so if ure on a budget, this a great dupe for mac ;)

I'd buy this just for the brush it works that well. Flat, firm and precise, making for an easy wing, the way an eyeliner brush should be. As for the liner, again a really excellent product that glides on smooth and clean. Beats high-end liner!

I really did not get on with this liner. I purchased it in hopes that it would become my HG so I didn't have to keep turning to higher end brands. Unfortunately I was wrong. On my lids it smudges relatively quickly, but the main problem is that when it smudges and I try to clean it up with water and a Q-tip, it's stuck in place. It will not come off. It's a really nice pigmented creamy black, and it is easy to work with, and even though I can see how people say it is long lasting, it just did not work for me. It ends up everywhere within a few hours, and it's so hard to remove at night, it's not worth saving the $5. MAC gel liners work so much better for me. They're pigmented, don't smudge, and easy to get off at night.

If it works for you, then I recommend it, because it is nice. Just the long wear formula and the smudging made me look like a raccoon every time I wore this because I had no way of fixing the smudges without REALLLLLLY wiping hard at my face.

This is really great, considering the price! It doesn't move around much, and it comes in some very pretty dimensional shades. I personally like brown for my fair complexion, it looks very natural and I also use a trace amount to fill in my eyebrows, and it stays put all day!