I had been anticipating this release for a long time and have watched various low quality versions of the performance. After receiving it I was totally blown away by the amazing video and sound quality after watching such low quality versions. The performance has such a different feel from the album. It feels more complete, powerful and organic. I can't stop watching it, and it's great to have the addition of the three non-album tracks, the daily mail, staircase, and supercollider, which are all excellent songs. While some will mourn the days of (insert your favorite album here), I think Radiohead are at the top of their game and the performance certainly reflects that.
As a side note on the Blu-ray, which I received, I had no difficulties playing it and I live in the US. Radiohead noted on there website that there may or may not be some playback issues in some other countries. I'm assuming this is why the DVD is also included.
No matter how you watch it though, you'll certainly love it.