I flew out through Manchester Airport again a couple of days ago, and I didn't make the same mistake I made before - I got a 100ml bottle, for £54.
I've had a nice full wear of it now, and I think it's stunningly good. Apart from the citrus in the opening, it doesn't seem to have much in common at all with the rest of the line. Though I wonder if I'm detecting something a bit woody in it that reminds me of the drydown of the basic ES? Not sure. But I am sure I love it.
The only problem now is that my wife's brother here in Thailand (who shares my liking for fragrances) loves it too and doesn't want me to take it back to the UK - I guess I'll have to get another bottle next time and keep one in each country