Offwhite

Sounds like cheating but my first paying customer is a friend of mine, who I've asked to subscribe to the premium feature in my app. I would never consider this a win back in the days but now it's really worth while because I know that the payment process works. So if no one else is subscribing, it's not because of broken code. :D

What a wild ride. I've published Apps to the App Store before, however never with payment integration.
I had my app been rejected at least 5 times. Each round trip took at least 24 hours and another 24 hours for me to get the motivation implemented the requested changes.
Important to now is that you have to provide Terms of Service and a Privacy Policy at certain places. App Store Description and available in the app before purchase. Broke my design a couple of times. Was not fun at all. But now it's available, check it out :)