This is my favourite eyeliner brush. It is more precise than my MAC brush that I now use for my eyebrows. It is absolutely amazing! It is quite stiff but not tóó stiff. It is incredibly precise. I prefer slanted eyeliner brushes over brushes that are small yet round (if you understand what I mean) because it is so much easier to make a winged eyeliner. The bristles don't flare out either. And if they do (because I've been clumsy) it is very easy to correct them. I've had mine for YEARS and it is still my favourite out there. I'm afraid it is discontinued in Europe, so if you can still get your hands on it, do it!! In fact, I might just buy 3 back-ups for it because I love it that much! I don't know what I would do without this one.
EDIT: I just found out that the previous version is discontinued (that I was talking about) and that a new, mint-coloured version came in its place, that looks very much alike. It's supposed to be an improved version. I will try that one and update if it's better!
UPDATE: The mint version is actually even better!! And more precise!! Love!!