I bought this in n.o 4 long and curl

Pros:

packaging is really nice and unique but sturdy

mascara formula is liquidy but not too much so..makes it really easy to apply!

color is a good jet black

lengthens lashes and adds volume

pretty waterproof unless you rub your eyes or something

layers really well

Cons:

not completely waterproof

the brush really doesn't make much of a difference in my opinion

doesn't smell offensive..but not exactly good? (well your putting it on your eyes anyway)

Overall I like this product one of the best out of korean mascaras that i've tried (which actually isn't that many). But I would pick Japanese mascaras any day haha

I think the innovative brush thing is just a bit of a hype, it doesn't really make a difference. I really like the consistency of the mascara though! :)