Makes me want to punch myself cause it makes me feel so damn stupid when I can't get it to work. Then I'm stuck with more random scribble marks when the rewind fails.
Please, no rewind gesture unless a failed rewind doesn't activate other stuff. It's horrible to have a rewind feature where you can accidentally draw on your pad, causing more issues.
Other than that, decent article. (And the Paper app is awesome, just I hate the damn rewind function. It'd be so much better if it was like a slider like a video)