This is a great brush! I use it to apply my base shadow and it works perfectly.
I got my husband to pick this one up for me after looking it on the web site. The pics on the MAC website make it look like its on the same scale as the 213 fluff brush that everyone raves about. So I was shocked to see how large it actually was. I have small eyes so it didn't work for me. I like my 228 mini shader better and the 219 pencil brush is divine for crease work. Needless to say, I returned it.
Of all of my 15+ brushes, I must say that I use this one the most! I was flabergasted that someone had not reviewed it yet! I have very small lids and this one is perfect for sweeping the perfect intensity of color across my lids. The hairs are packed pretty tightly allowing the brush to pick up a good amount of color. Even though I have several brushes specifically for contouring, I use this one since its rounded end fits my crease perfectly. I couldn't do without this brush!