I’m a Ghost(Pro) customer and loving the way the system works.
The one recommendation I have is that the Ghost(Pro) admin interface should allow you to create multiple sites under the one account. For instance, I run a business where we have multiple blogs/sites on different domains for different services we offer. I’ve been having such a great time with Ghost that I want to migrate all our sites across Ghost(Pro). It would be great to manage these all from the one account login rather than having an individual login, invoice, and payment for each site we create. In the end they’re all going to be billed to the same card, so seems like this would give a lot of extensibility to the Ghost(Pro) product if we could just add more Ghost(Pro) sites, and link those to custom domains etc, all from the one master admin account.