For the price, this eyeliner is unbeatable! It has a great, quality felt tip and application is super easy. Even with hooded, borderline-crepey lids it just glides on with ease.
I've had no trouble having it last all day over top of a lid primer, but could see it easily breaking down from oil on bare lids -- it is definitely NOT waterproof. The color could also be a lot more intense -- not what I'd consider blackest black -- but again, for the price? I'll let it slide.