Minimum spend $49 (excludes shipping and alcohol and Apple products). One time use only.
Not sure about expiry date
UPDATE 1: see comments below, code worked for sometime but has been inactivated (since about 11am 28 Jan).
UPDATE 2: see @Ytrewq's comment below for a working code. This code comes from subscribing to marketing emails so lots of people might have already used it. Hopefully it won't be choice-cheapied this time, but as before, if you want it use it before they take it off.
What’s the trick with using the same code twice on the market?