i also get 24 hours from it,(current formulation) but not nearly as strong as at the initial spraying of course. you have to apply it like you MEAN it! i think olefactory fatigue has a lot to do with it.your nose gets used to it and doesnt recognize it as quickly. it is very strong juice, just not harsh or biting...sort of fools you. its strong but very smooth, as opposed to say giorgio beverly hills for men which is strong AND harsh. really lets you know its strong, theres no such announcement with antaeus, merely its smooth presence. for 20 hours or better. i see it as a powerhouse for sure- its got attitude, just a sexier attitude than others. its got sillage and strength. and it smells great. if it is smooth and not harsh, does that mean it is well blended? or is that another story?