Whoa, this looks pretty fantastic to me. Have you thought about integrating with Shopify? It has a lot of trouble with recurring payments, and Chargify is a pain to use and adds an additional $60/month charge on top of the Shopify fees (it is still worth it, but Shopify having simpler recurring payments would be amazing). This looks like exactly what I was looking for about a year ago when I add recurring payments to my store.
EDIT: After signing up, I see integrating with Shopify isn't even necessary. Do you plan to compete with them? Or potentially be a feature to work with them?
It's targeting people who want to be able to put together a store very simply and quickly (at least that is why I used it). It definitely has a weakness on recurring payments (pretty much the only thing Volusion does better, in my opinion), but other than that it is pretty fantastic in terms of connectability and ease.
EDIT: After signing up, I see integrating with Shopify isn't even necessary. Do you plan to compete with them? Or potentially be a feature to work with them?