One has been around for a while and while I used to wear Calvin Klein, I wore a different scent than this one but I really loved it. I do like the light, citrus scent of One and its versatility. It can be unisex and it isn't heavy or over bearing. This scent can also be wore during any season and night or day. I like the freshness of the smell because I dislike heavy perfumes-they can give me a headache and make me sneeze. One is a classic that never goes out of style. The price is reasonable and the scent will last though out the day or evening.