There seem to be some online ads for the same, but so far clicking through with them doesn't work (for me at least). But seems like good news if the T&Cs aren't too ridiculous!
Any more information on this as it's one I could use?
And is the 15% added on arrival, or does it take a while to show up (ie the Amex to MR to a week extra for the 15% to hit).
I am asking as if I do it, I would do an immediate redemption.