It is pretty awesome, but also - pretty pricey.
After googling around for a bit I read that Too Faced had a close dupe in their range and I wanted to give it a try. It's called the Full Bloom Ultra Flush Powder Blush in the color Who's Your Poppy?
While Orgasm retails at 29€ / 28$, Who's Your Poppy? only costs 19€ / 19$.
(Another great example of unfair international prices..)
The NARS blush is a bit bigger and the Too Faced one isn't exactly cheap either but still, I decided on getting the dupe and borrowed Orgasm from Kate for comparison.
Orgasm has a very silky texture so if you're not caredul you use more product than you neccessarily need to. Who's Your Poppy? on the other hand is a lot firmer in the pan so you need to go over it a bit to really load up your brush.
Colorwise the two blushes are really very very similar. Orgasm (the lower swatch) is a bit darker and more on the dark-orange side, Who's Your Poppy? is a bit lighter and looks a bit more pink. The golden shimmer however is really exactly the same in both blushes!
The difference between the two can only be seen if you look at the swatches very closely, like in these photos. As soon as the blushes are blended out, they look the same!
Close enough? I think so :)