Received mine today from Burning Shed, signed postcard and all. I only had a chance to skip briefly through the 5.1 mix but...
WOW!!!! Now THIS is a surround mix!! After the semi-disappointment of Who's Next, Steven Wilson redeems himself completely in my eyes and ears with this. I can't give a rating yet, but my first impressions were extremely favorable. It was open, revealing, punchy and intimate all at the same time, and with plenty (and I mean *plenty*) rear channel action. Some people will say gimmicky, I say "made for surround". This is how I like it!
This album always had a problematic mix, and the awful 2001 CD remaster did it no favors. The new 5.1. mix completely transforms the album, and I would guess the 2.0 and Atmos mixes are as good.