This is a fantastic eyeliner brush! It's like a mutant MAC#266 brush . The brush is thicker and longer than a typical angled brush and the bristles are stiff enough to hold dark shadow and not create dust that sprinkles all over your cheek.
I've found it to be very precise and it allows me to get right into the lash line. The size of the brush may be intimidating, but I think it adds to the performance and I usually only need one dip into my shadow of choice (MAC Brun) and one good press into the lashline and that's it.