Got this in the mail last week, and decided to go into the Sydney store today (now at Woollahra/Paddington). Didn't have to show this card, so thought I should share with others.
Deal is 50% off everything in store(eg. Men's Polo's were $109, now $54.50) - which I confirmed with 2 store staff.
Deal is currently better than DJ's 40% off selected Gant clothing.
Ugh it was only 25% off in Melbourne today