Does not work as expected.
In the article below by shopify, it is stated if you leave the date fields blank you can create a code that does not expire. Not true. It does not work. I didn't notice the end date sent out my codes and all of them expired th3 same day I sent them out. I had a second look today & tested it and no it was no error on my part, but the app does not work. — All they had to do was code a check box for this like on the regular discounts page, but no, instead they served it up half done. Bad UX design anyway.
Since I have decided to go with shopify I am finding a lot of apps work one way or not as I expected. Ultimately I am not finding what I want without being nickled and dimed by every app maker out there. So, my last web search was how to migrate my shopify store to another service provided that I will not name. It's getting to that point, but I would prefer some of these features be built and and actually work, that goes for a number of apps I have tried.