I am a massive self-confessed fan of ELF. I love a lot of their products and had heard great things about this, so decided to give it a go.
Like a lot of their other products, the packaging on this is functional, sleek and looks more expensive than it actually is. This doesn't feel cheaply made or fragile and it travels well.
The tip of the brush is super fine - which I love, as you can make your eyeliner as thick or thin as you desire. I find this easy to use and it doesn't tug along your eye or leave nasty, watery streaks. The product is fairly pigmented and it is semi-smudge proof.
This dries to a semi-gloss finish, doesn't have a scent and nor does it irritate my eyes like some other eyeliners do.
As to be expected, this isn't as smudge proof or pigmented as some other, more expensive brands of eyeliner are. However - for the price I think this is an absolute steal and I am guilty of having 2 of these as backups...
I didn't have a lot of experience with liquid eyeliner before buying this. I thought I would buy a nice cheap one to practice with and then buy a better one. But actually - I'm really happy with this one and have just purchased a few from ELF in their sale so I never run out!
I like the packaging, it's basic - but it's sleek. The brush is thin and creates a good line, it's easy to get close to the lashes and build up to the thickness that you want. The formula is smooth and one sweep is enough to create an opaque line, it dries quickly and has great staying power.
I'm still playing around and figuring out what I like, but it's so cheap that you can practice without feeling like you are wasting it.
Tips: I got my first one on iHerb for $3 I think it was.