I own quite a lot of brushes, including MAC, but this one I just didn't get it. It can be dues to the fact I rarely use eyeliner, and if I do I normally go for those types that come with a brush. With this being said, I guess I simply have little experience getting it right.
I could not apply an even stroke with this brush. The lines would come out dirty and the product would not be spread evenly.
I also find the bristles being to sturdy, they almost don't bend at all.

LOVE IT!!!
It's my first MAC brush and I'm in love! I use it for applying gel eye liner and it create such a fine and clean line! I would definitely repurchase this brush! A necessity!

I am obsessed with this brush. I use gel eyeliner everyday and this brush helps me to complete my look easily and efficiently. I'm in love with MAC brushes in general and although they are pricey, they are worth investing in :) they are super soft, high quality and work wonderfully! Highly recommend this brush!

Not sure if I got a dud here.. But the bristles are totally not stiff! I wear winged eyeliner almost every day. I remember liking this when I originally bought it, but the bristles must have crapped out. I usually love MAC brushes. Hmm..

I like the firmness of this brush and it is spectacular for using a gel liner. I use it most frequently with eyeshadow as liner and it does very well in that capacity. I am a dunce with anything but the easiest to use pencils for lining and this brush has turned me into a pro. I am now wearing liquid and gel liner and it is no longer looking amatuerish. I have another flat type eyeliner brush that I no longer bother with since this one is so versatile.

I love this liner brush. It is bigger than the 209 but it is also firmer. This brush gives a great defined line that can be seen on the first swipe. I purchased the older version at the CCo. I didn't like the shape of the newer version and it's not as firm and long as the older version.

MAC 211 is a synthetic brush I use for drawing eyeliners, and it works well on my eyes. It feels soft yet very stiff, which's perfect to line out an even gel eye line. I can even do it with one stroke for the whole line, while I usually dap and dot to create a line using other eyeliner brushes. I would say it's very easy to control if you place your mirror on a table, look down and hold your eye lid up. I can also use this to smudge a line - maybe I will use a black eyeshadow to help blend it.

If you're thinking of which one to get among 209, 210 and 211, I guess 211 is a standard one for everyday use, while 209 and 210 are extra-slim for extra precision, but then again, I don't draw extra slim eyeliners on my Asian eyes. A standard definite slim line works for me.

Bristles: 5/5
shape: 5/5
versatility: 3.8/5
application: 5/5
price: 4/5

Overall: 4.56/5

Love this liner brush. It makes a great winged liner and puts the 210 to shame!

The 211 is a great brush for applying gel liners. It's a very precise brush that makes the application of gel liners easiler. I usually get a very fine line when using this brush, and a thicker line when using the 209.

Fantastic brush. Loved it the minute I used it. This is the PERFECT brush for gel eyeliner. Gives me a nice line and blends wonderfully.