One of my favorites!
To begin, this product lives up to its name. The felt liner tip is fine (in terms of both shape and amazingness)! It works beautifully when lining the inner corners, making an exact cat-eye edge, or just trying to go for a more natural, thin line.
The pigmentation is solid and it glides on like a dream!
I recommend this for everyone, but especially if you're trying marker tipped eyeliners for the first time. Since it is so thin, you can easily control where you mark, and build up if you want! And of course~ it's inexpensive!