Most people judge a new fragrance in the first thirty seconds, which is a little like judging a movie by the trailer. A layered fragrance is built to change over its lifespan, and knowing what to expect at each stage changes how you experience it.
Week one is the loudest, in the best sense. The top notes are freshest here: the citrus in FOUR, the cardamom in ONE, the bergamot in NINE. This is the version most people fall in love with on day one, bright, clear, immediately noticeable.
Somewhere around week two, the top notes have settled, and the heart notes take over. This is where a fragrance actually shows its depth: the jasmine in SIX, the amber in ONE, the ginger warmth in FOUR. It reads less like a burst and more like an actual scent with dimension, the part that tends to earn the "what is that" question from a passenger who has been in the car a few times now.
By weeks three and four, the base notes carry what is left: vetiver, musk, driftwood, depending on the scent. Softer, quieter, but still genuinely there, the part of the fragrance that lingers longest, the reason a well-built scent does not just vanish the way the $1 tree does after day three.
None of this is a flaw. It is fragrance behaving the way fragrance is supposed to. If you only ever judge a scent on day one, you are meeting maybe a third of it. Give it the full 2–4 weeks. The version you meet in week three might end up being your favorite part.