On the first day of the Upper Sixth, my entire French set was ordered to have one of these dictionaries by the next week. I ordered it off Amazon.co.uk and it came in no time and I use it all the time.
Anything you want to look up is in here, plus it's got the languages the right way 'round (there was one edition, I believe, where English-> French came first, but this one is the "right" way 'round).
Couple of slight drawbacks - the sheer volume of words leads to a massive size, which puts you off using it, but when you find that , yet again, the internet fails to return your search, you pick up the book and find it in an instant. It also gives you compounds which include the peculiarities of the French language, ever helpful!