Course rather than first impression
The first spray is often deceptive. Notice whether the scent still feels coherent after minutes, after an hour and in the evening.
Longevity and sillage
How long does it last on skin and how far does it project? Both are subjective and depend on skin, weather and amount.
What is no proof
A high price, a heavy bottle or famous names do not guarantee quality. Rely on your own nose.
Conclusion
A good perfume develops over hours, has a coherent course from top to base notes and stays pleasant without turning.
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