IO Industries Inc. review for Digital Downloads

I have been testing this for several days now and I have not experienced any problems. The download emails have never taken more than a minute to show up. I was wondering if anyone has been able to get access to the attachment URL as specified in the email template ({{ attachment.shop_url }}) but on the customer orders page? A great feature to add would be to produce unique keys with the download from a list. This seems like a standard feature on other paid apps but could work so much better if it was integrated with Digital Downloads.