I'm getting peopel tell me that discount codes don't work. When I go it works and after talking I'm find out that they are not clicking the Apply Discount tab (I suppose because it's a grey tab so it seems like it's not available) you should make it another color (green to go along with your color scheme, or automatic when the right code is applied). Also the same for add attendees, it's easy to miss especially again when it's in grey. (bold black or green maybe)