Not what the name says
Oh sure, there are roses in Fleurs de Bulgarie. However, they are not the true theme of the fragrance, in fact I doubt they were meant to be: A house as reputed as Creed knows how to create a predominantly rose scent, take Fleurs de Thé Rose Bulgare, for example.
But not this.
Fleurs de Bulgarie uses the roses as a stepping stone for the Ambregris. In fact, anyone who really gives it enough time for the full development to proceed and the drydown to take place will notice: This perfume is all about the Ambregris, the roses are only there to provide a flavor, if you will.
It will touch the skin and be a delightful opening of fresh, dewy roses, with the typical aroma that only Bulgarian roses can impart. Beautiful. But as the fragrance moves on, the roses become more transparent and only lend their texture and part of their scent to the rest of the composition. As the Ambregris takes center stage, it retains some of the roses' characteristics, but the real alpha player is and remains the Ambregris.
And as such it does what Ambregris is famous for: it dresses the skin with a veil of warmth, depth and animalic pungency, not in an overbearing manner, mind you, but not in a forgettable manner either.
Will it smell like roses? YES. To a point. In the end, it plays up the skin of the wearer to the Nth degree of attraction, because that is what Ambregris is: The lusty agent. The roses are the counter point, they are what keeps the fragrance from becoming an overly one dimensional animalic excess. There is a fleshy, salty angle to Fleurs de Bulgarie which for me makes it better suited to, um... certain non public encounters. *wink*