I've listened through twice now, and my thoughts on first listen did not change on second listen, so here they are.
The sonics are fantastic. It just sounds brilliant. Did anyone notice, in "Discovery", after the guitar is in tune and the chords begin, a slight warble as if the source tape were just a tad too old? That's the only flaw I could hear in otherwise perfect sonics, in my opinion.
The mix is interesting to me in that I find it to not be a very good 5.1 mix, but a great mix nonetheless. It certainly, in my opinion, wouldn't convince a newcomer to run out and buy a 5.1 system. There a very few moments of discrete elements in the rear speakers. But again, I think it's a great mix. It fills the room very effectively. It just sounds so much better than stereo to me, even though there aren't sounds flying all around me.
If I could re-mix this, I'd try the approach Steven Wilson took with the ELP discs, and put bass and drums across the fronts, rhythm guitars in the rears, and lead vocals & guitar solos in the center. I'd alter this approach when acoustic guitars are present by putting the acoustic guitars in the rears and electrics in the fronts.
I love the visuals. Many of us have stated a preference for lyrics screens that change automatically, but the addition of the comic strip takes this to a new level. As kap'n krunch mentioned in the DVD-A poll, it's odd that none of the original artwork is present - at least I thought so, until I looked at the photo slide show in the bonus features.
So for me, this is an 8. The sound quality and visuals make this a wonderful audio-visual treat, a whole new 2112 experience, but the surround mix pales in comparison to so many others.