Betfair Cheltenham Specials

I am wondering if anyone has been tempted by the Betfair's offer of 150/1 for the treble of Faugheen (Marsh), Defi Du Seuil (Ryanair) and Thyme Hill (Bartlett). If you back the same horses with the same firm outwith the offer you'll get 503/1 for the treble. And then you have to trust each horse to turn up for those races. Doh!