I had the same for the W in Santiago. Which was excellent by the way. Used the 2nd night save your age promo instead as base was much lower (269$ vs high 300s for ZBT vs 295 advance purchase). Worked out as $400 for the 2 nights.
Was very happy and thanks to gold status (from a plat fter, many thanks!) got a 2 level upgrade from wonderful to cool corner.