I think it's a great app and makes it so much easier to add cards to deckbox. Don't get me wrong, deckbox is great, I just get sick of all the typing is all. 
Unfortunately, it doesn't seem to work on my phone. That red box doesn't appear. The picture seems clear enough, even though the camera's not that good. (Old phone, still runs android 2.2..) It just shows the green letters and a little green box is dancing around.
Still, great idea and awesome app!