The AppYou've written the great app. You are pretty sure it will pass. You've tested it on your emulator and on your device (the only device you own). Good enough, ship that baby!
But hold on a moment. Is it as great as YOU think it is? I've found over the years that something I think is great isn't nearly as great as I thought once other people start looking at it. You put buttons in places that make perfect sense to you but a friend, looking over your shoulder points out that you probably don't need buttons at all. Or you are showing off your fabulous app to your 15 year old son and, after he stops laughing, points out that your app is "quaint" but probably too much work.