Pros:

1.Works well with liquid foundation for an airbrushed look
2.Ideal for more pigmented blushes

Cons:

1.Expensive
2.Sheds every single time
3.Not as effective as a flat brush if you need more coverage

It is the only MAC brush I have and I must say I hated it at the beginning. I bought it for applying foundation, but it seemed very flimsy. After some time I realized that it is because the foundations I used at that time were to thick and called for a different brush. Now that I'm using lighter foundations that don't require too much blending, this brush is perfect. It creates a natural finish and doesn't leave streaks on the face.

My only problem with it is that it sheds. I know that it is used everyday, but for the price you expect the brush to keep its hair a little longer than 2 years I've had this brush for...

I would have to say that this is one of the best MAC brushes I own. I use this brush for applying blush. It's especially good for pigmented blushes like Nars blushes as it allows you to apply the blush lightly without risk of over-applying. You can then build up the colour should you wish. It's versatile (also great for stippling foundation) and should belong in everyone's collection IMHO.

i just love this brush its great for powder and liquid foundation i also use it for putting on my blusher you can not go wrong with this brush and its super soft its worth paying more for a good brush that will last a long time

pricey but if you buy this brush alone it does everything from powders to creamy foundations, i LOVE it.

Love this for foundations and cream blushes. Sometimes for MAC or other brand shimmer powders. Will always have this in my brush collection.

I love this brush for cream blushes. The soft, springy bristles are perfect for diffusing pigmented creams (I like MUFE liquid blush) on my cheeks. The MAC SA suggested this for bronzing and loose powders and I also tried using the 187 for foundation, but my preferred use is for blushes. It applies color softly and evenly for a really natural look. Bristles stain easily, even after washing, but doesn't shed at all and feels soft on my skin. It isn't a must-have brush in my collection, but glad to have it.

I love this brush. I've had it for 3 years and it has never shed on me. It is still as good as the day I bought it. For those who are wondering if they should shell out the $40 for a single brush, well, that is really hard to say. I've used cheaper foundation brushes that aren't AS good but are very close. Its really a subtle difference when all is said and done. I wouldn't say the skin actually looks "airbrushed" when you stipple the makeup on with it...Tbh, I Don't notice a big difference in the way the foundation actually looks on my skin compared to normal foundation application...but the brush itself is really high quality, lasts forever, and is very versatile (blush, foundation, etc), so it gets 5 stars for that.

Updated 01.02.2012.
Ive had this brush for a few months now & I can honestly say this brush does not shed like alot of people say it does. If ive had 2 hairs fall out in the couple months ive had it, then that would be alot. I would recommend that if you are wanting to purchase this brush, purchase it from a MAC store. dont be tempted to purchase if you think it might be fake!

Initial reveiw :
This is undeniably the best brush I have ever purchased. Yes it's expensive but it does what its supposed to & more. I use it with both liquid and powder foundations although it does definitely work better with liquid foundation. I use fix+ spray with my powders to increase the airbrushed look. Excellent product & definitely recommended. continued >>

Gives me a natural airbrushed look. I dip it into my foundation and just dab it all over my face. Then I swirl until perfectly blended. It's never shed badly and is easy to wash. I usually dampen it a bit too for a light fresh look.