Being from the city of birches (Umeå, Sweden) I was happy to get a sample of this fragrance. I have a really hard time picking up on the birch leaves in the beginning though, so the birchleaves that interested me when reading the notes was a small disappointment.
I have been in the Diptyque Paris store and the absolute wall of perfume that hits you upon entering is overwhelming. I think I've read somewhere that this is the experience Olivier Pescheux has tried to capture. The opening is indeed violent and borderline cloying.
Out of this somewhat chaotic opening however, a lightly smoky accord not at all unsimilar from the one in Knize ten emerges. Maybe it is the floral accent from the geranium and labdanum combined with the smoky character from the incense that evokes this association in me. I can even percieve a subtle leathery tone, although it is not listed in the notes.
Eau de trente-quatre is warm, green and natural. Patchouli is a note that I usually do not enjoy very much, but in this case it remains in the background. The cedar is sublime and with a palisander type aroma.
It wears close to the body, the opening explosion of notes wears down to a comforting, pleasant smell for your own enjoyment. Sillage is moderate.