I recently purchased NARS Sin, mostly because I happened to be in Selfridges with Helen of Just Nice Things fame, and she pretty much told me I had to. And I am so, so glad I did. It's a gorgeous, well pigmented berry toned blush with a very soft luminescence to it, and it's just fantastic for winter.
I think that the best thing about this colour is that whilst it's the kind of shade that injects warmth and colour to the face, it's actually reasonably cool toned. There's no red or orange in this shade at all. I find it a really complimentary shade on my skin, which runs a little bit cool from neutral.
The biggest surprise with this blush was the pigmentation - I'll admit that the first time I applied it, I did my usual soft-swirly thing and ended up totally overdoing it. A single light touch of a brush to the pan is enough to start with - it's much easier to build up a pretty flush that way.
Lovely. I think I'll be wearing this shade rather a lot this winter. It goes particularly well with neutral eyes and plum lips, but in general it's a pretty versatile colour, and one I'm very pleased to have added to my collection.
NARS Sin is available from HQHair, where it will cost you £20.50 - spendy, but absolutely worth it to my mind.