The basics should already be evident. As always, the musicianship is top-notch, the compositions are complex and well-thought-out, and the style maintains the balance between "black" and "progressive" quite well. If you've listened to an Enslaved album in the past decade, you've got a fairly clear picture of what to expect.
That said, I found myself consistently more engaged this time around than I did with its predecessor RIITIIR. That record was pretty and it was well-executed, but it all felt a little low-energy and dull. Though this is not appreciably "heavier" it does feel as though more energy has gone into its production. The music is more varied and interesting. The compositions are fresher. The band has become more adventurous with the progressive end of things, they've added just the tiniest dash of post-rock atmosphere here and there, and simultaneously they're making better use of their black metal edge. Granted, I've been feeling less metal-y recently, so maybe I'm just more receptive now than I was in the past, but the progressive flair is starting to grow on me.
Overall, this is just a really excellent record. I have yet to get started listening to much new material in 2015, but I can already predict with a fair degree of confidence that this album will find its way onto my year end list.