I'm enjoying it a fair bit. I don't think it's on the level of Absolution or BH&R but it's a huge improvement over The Resistance, which was extremely disappointing. I'm not sure how I'd rank The 2nd Law against Showbiz or Origin of Symmetry yet.
The thing I noticed about this album is that it still retains the same poppy 'epicness' that was prevalent throughout The Resistance, but unlike that album, there is actually songwriting present here. The biggest problem with The Resistance is that the entire album tried to sound so 'big' but there was no substance to it. That sound had no underlying substance. There was no foundation upon which that big sound was based. With the exception of 3-4 songs, the entire albums was just big for the sake of big.
The 2nd Law isn't like that. While it retains many of the same sonic characteristics, it feels like that 'big' sound is actually based off of something. Whether we're talking about interesting electronics, creative guitar riffs, or pretty melodies, the songs actually have something to them. They have their own sounds and are not just big for the sake of being big.