Hennessy is overrated.
Normally, Cognac is too sweet for me. And i like sweets; cake, pies, candies. But this? This is something else.
Martell is a reputable brand, and if you also think normal cognac is too sweet, then this worth a look for you.
Blue Swift is their normal spirit, finished in used bourbon casks. The heat of the bourbon keeps the sweet of the cognac in check, and neither one is too over powering. Both are sweet spirits, but they meld well with each other, and again, thanks to the bourbon's heat, it's never too sweet. It's like a symphony of fine spirits. Or, more accurately, a harmonic, death metal ballad.