The product itself is really nice and actually it's my first pen liner. However... I actually didn't really like the product as much as I thought. After application, it looked great so I thought it would be okay to wear it on a day trip with my sister and her friend. I was wrong. The eyeliner started to smear from me sweating. I honestly don't know if sweat affects waterproof items but I was upset that it didn't last as long I hoped. After about an hour, I gave up and just removed my eyeliner all together for that day.

So I guess my advice is don't use this product when it's humid outside. It's honestly best to use when you're at a party or something like that where you won't be wearing it for the entire day.

However despite my mistake on that... the product was decent. It's a good pen liner for beginners of pen liner like myself. The pigmentation of the product is pretty good as well. The only other annoyance of the product is that it doesn't dry that quickly after application (I had to keep my eyes closed for almost a minute before it dried).