I saved over $700+ last November with a general code that came out (no pin needed). We had a Garden View room and stayed 6 nights, not sure what the discount % actually was.
This year we're booked with a 20% discount (thanks to a pin code my mom received via email), but still hoping for an even bigger discount to come out after summer. If not, I'll gladly stay with the current 20% discount we got. Originally booked at rack rate and was able to apply the discount when she received it.