I was able to get in to the program; it wasn't too difficult (this is a couple years ago now), though it seems things have changed (credit review was not required at the time). That being said, if there is any way for you to make your accessory work via WiFi or Bluetooth Low Energy I'd go that route.
I am considering Bluetooth Low Energy as an alternative; although, WiFi definitely won't work. Anyways, if it wasn't too bad, I may just give it a try and see how it goes.
To clarify: it wasn't too bad to get in; the program itself was a huge bag of hurt.
Really, if you can make it work, I highly recommend using Bluetooth Low Energy instead.