I've been wearing YSL Paris Eau de Toilette Spray for ~25 years and know the scent very well. This product does not smell right! And, the scent it does have is very short-lived. So, either this is an imitation product, or it is so old that it degraded in the bottle. Perhaps it had not been stored properly. I bought this particular item because of the larger size (4.2 oz); perfume shops (and other amazon.com vendors) carry only the smaller sizes.