Think about that. . . the people who would be USING this app, will be people moving to iOS and not using this app except a single time and the using iOS from then on, a platform which will be using the same user interface as found on that app.
In fact, the only use for this App is to do that. No one NOT doing that will even attempt to use it, trying anything with it, to try its usability, so how can they even have an informed reasonable opinion? They've never used it to do what it's designed to accomplish.
In fact, the interface is merely a screen with set of five choice switches allowing the user to select yes or no to including certain types of data to include in the sync or not, and continue and cancel buttons, the second screen is merely a "Transfer Complete" screen informing the user that he/she has successfully transferred his/her choices to the iPhone. . . and a quit button. How much more simple can you make a user interface than that?
The fact is that the vast majority of those who are writing those complaints have never downloaded the app, never opened it, and never looked at any other iOS app.
I wasn’t saying that critiques of design and useability were accurate, only that they’re fair game.