It's great that the app is free, but it's almost necessary that there are links available on the webpage immediately after purchase for customers. Too many customers miss the email, or don't get it all together. For every 200 downloads, we had around 10 customers complain that they didn't receive the file and we had to resend it.
That said, the other apps for digital distribution on shopify are WAY over priced for people like us who want to sell high quality 20 minute videos on a regular basis. We'd eventually be forced to sacrifice our backcatalog if we started our setup with a different provider. :/
Great first effort in terms of seller experience on setup, but it just needs that little step forward to make it a good customer experience too.