Love it. I used Duque de Alba brandy and Pierre Ferrand Curaçao. What I've enjoyed the most is that Curaçao shines here, compared to so many other cocktails where it gets obscured by other ingredients.
A must try, in my opinion. It's delicious, only that it lacks of some complexity. It probably depends very much on the brandy used. I went form Xerez Gran Duque de Alba, which is good, but quite sweet. Maybe I should try with a better, drier one.