I was finally able to get this all downloaded. The Mac jdownloader program liked to crash, so I had to get each piece individually, but it now resides on my new Firewire hard drive. :)
Haven't yet had time to actually watch the movie, but I flipped through it last night on the computer to get a general idea. On the whole, it's pretty fantastic. The picture is clean and detailed and the colour for the most part seems very close to the original. Seeing such a good image without the hideous blue cast is rather wonderful, and most of the original shots that were put back in blend well with the rest of the movie--they are at times noticeably softer but not horribly so, and I'm very impressed that it came together so well.
It does seem to me that the removal of the blue cast was actually too aggressive at times--shots that should legimately have blue in them are now sometimes a flat sort of grey (such as the appearance of the Executor, as evidenced by 70mm film scans). The sabres in the cave scene didn't seem to have been corrected, because they still look washed out and dull as they do in the 2004 version, but they did look rather better elsewhere. As Moth3r pointed out, crushed blacks and skin tones were sometimes problematic, and there's a sort of slight 'fake digital' look to it sometimes, but that's just a limitation of the source material.
I've only listened on my headphones so far, not the full 5.1, but mostly the sound seemed pretty good. The majority of it is the '97 SE mix, so there are various dialogue differences from the familiar 35mm version (how many of them appeared in the 70mm is anyone's guess). Some parts of the movie use the 1993 mix, but this was not always done consistently: most--but not all--of the music edits, and a few of the lines, in addition to the obvious places where the edit differs from the SE. Occasionally the transitions between the sources weren't always seamless and had audible jump cuts, though admittedly this was rare.
What I can't figure out is why adywan decided to use the surround channels from the 2004 mix combined with the front channels from the 1997 version. I won't fully know what that sounds like until I've had a chance to play it in 5.1, but while usually they are similar, occasionally this results in a bizarre effect when they don't match up. Most clearly this can be found when Luke observes the probe droid meteor landing on Hoth: the dvd version added a rolling echo that moves from front to back to bolster the impact, but in this mix only the rear half of the sound is heard (in all pre-2004 versions, this was not there at all).
Most of these things come down to individual preference and nitpicking, though. He has done an incredible job with this, and I'm very grateful to him for making this version. Here's hoping to see a theatrical version of Star Wars from him sometime in the future. ;)