MAC 263 is THE perfect brush for effortlessly creating any sort of eyeliner look, from natural to glam. I am fairly picky about which makeup brushes I use, as the right tools make a big difference in application and overall results. This is especially true for eyeliner brushes, so MAC 263 is absolutely worth the price. While it can also be used as an eyebrow shading brush, I only use it for eyeliner. The bristles are very dense and firm, but soft and flexible enough to easily work with. This makes application very precise. I generally use this brush with MAC Fluidline, which I love, or with a matte black shadow (Urban Decay's Blackout is my favorite). I prefer a more natural, slightly winged look-- since the bristles are firm and dense, it is very, very easy for me to get a thin line. This can easily be worked up to a thicker, more dramatic cat eye. Application is always easy and precise. Like my other MAC brushes, the bristles retain their shape after multiple washes. If you're looking for that perfect eyeliner brush, look no further.