I did it (still no results), but please send me an email telling me when your app "remove itself" from my gmail account with a link to where I can check this myself (and cancel it myself if you didn't). This would make me trust you more. I would NEVER have it tested in the beginning if I hadn't see it upvoted here in HN.
Actually, I realized now that don't even know where to go to manage this gmail apps.