This scent is very subtle, and its one of the few that I find that does not aggrevate my allergies. The atomizer is good, probably improved from the original review, as the pictures there are very different from the current atomizer, which seems to work fine. As far as complexity, I think there is a mixture of citrus especially in the beginning with the sandalwood, and the scent evolves over time. It is not synthetic as an earlier review tried to imply, but instead uses EO. If you like really strong smelling flowery or musky colognes then this is not for you, but if you like subtle, but long lasting masculine scents, this is a great choice. I highly recommend it.