Well, picked this up today (Limited uber-U2-geek Edition) ;), and I've got to say it is a vast improvement over the original. I've yet to listen to it on my Axioms, but even in the car the improvement is obvious. It's not the best sounding cd ever by any stretch, but it's better than the original in every way. The first and most obvious improvement is bass - much more weight and definition (without going overboard). Overall it seems like they've pretty much lifted a veil off the original. Transients are much clearer, instruments have more definition, channel separation is better, vocals are clearer, (especially background vocals), and they've done a good job of equalizing the mix across the album (no more turning it up to hear Exit properly). They also didn't go overboard - not too hot and no wacky separation or panning thrown in. Definitely worth the upgrade.
Now excuse me while I go listen to it through the M3s.
