That shows it working fine on Windows Phone 8, not Windows Phone 7.X. Here's a video of a device running it on 7.X: http://www.youtube.com/watch?v=UfTS1f8vqAo h

That shows it working fine on Windows Phone 8, not Windows Phone 7.X. Here's a video of a device running it on 7.X: http://www.youtube.com/watch?v=UfTS1f8vqAo http://www.youtube.com/watch?v=UfTS1f8vqAo Practically unusable. Seems like they didn't test WP8 devices before making the call for whatever reason.