I got this for a friend of mine this Christmas and we listened to a bit of it the other day. It has excellent remastering. Back in the day, I had import and half speed mastered LPs of some of this stuff, and it sounded good. But ELO's goofy "throw it all into the mix and phase shift it all around" philosophy tended to make for thick, muddled mixes. I suspect a lot of that had to do with technology. All of those layers probably necessitated bounce downs joining tracks to keep it all going at once. This set says that it involves not only remastering, but remixing, and it shows. Thankfully, they didn't try to "fix" their goofy creative choices, they just cleared up the cloudiness of the mix. Most importantly, they maintained the period style heavily compressed, band pass EQ vocals. The Stones made the mistake of "correcting" that on some of their remixes and it was a huge mistake. Also, the dynamic range is better than I ever heard on LP. Some of the pseudo-classical crescendos actually approach the scale of classical music.
Revisiting this after thirty years was fun. I can pick out all of Jeff Lynne's vocal jokes now... He does impressions of both John and Paul, Roy Orbison, Chuck Berry, Little Richard and even Bob Dylan. Back in the day, I liked ELO, but I thought they were Beatles/cartoony compared to the serious approach most other prog rock bands took. Now, I find the serious stuff insufferably pompous and ignorant, and ELO seems a lot more clever and fun. Live and learn.