Easily my favourite perfume! Definitely not one for every day wear, or for summer, but for special evenings out in winter, it's perfect.
(My mother wore it, mostly in winter (and Chanel's Gardenia in the summer, and possibly why I think Bois des iles is more of a winter perfume/wear it in exactly the same way as my mum did!)
I don't think it fades quickly either. If anything, quite the opposite. I've always felt that Chanel's special forumlas last far longer than the perfumes that are universally available.
However, it's not for everyone, and is incredibly distinctive. Along with Mitsuko, the perfume that always elicits compliments and questions asking what I'm wearing.