This is definately a fake. I wouldn't even give it one star, but I'm not allowed to leave a review unless I left something!
The bottle looks exactly the same as does the packaging but after spraying it I knew instantly that its not Eternity. Very similar, but not the same. The colour is darker, and the smell does not have the distinctive smell as I'm used to, and I should know I've been wearing the same perfume for 20 years. Kicking myself, when something is too good to be true, it usually is. DO NOT BUY THIS PRODUCT! Amazon, you should not allow this to be sold.