I'm gonna give it a chance...do I listen to all 52 mins?
If you've listened to In Rainbows, and liked it, I'd say absolutely do the whole thing.
If not, do it til you no longer find it interesting I suppose. I really enjoyed watching them make the music in a casual setting. But I'm also pretty fascinated by them (and this is one of my favorite albums in recent memory)
btw - someone posted this on CB a while back and that's how I came across it.