Warthur
I hadn't heard Mgla before With Hearts Towards None, and I'm not sure I really get them even on the basis of this album. The running order presents the album as a single continuous piece of music, which might lead you to expect something ambitious and progressive-leaning, but actually the album presents fairly straightforward black metal with the occasional punk affectation and more accessible and melodic section.
The problem is that other bands have produced far more compelling purist black metal, better accessible black metal, and more interesting black metal-punk hybrids, and here Mgla don't really do a good job of weaving these styles into a coherent whole or justifying the epic length of the album. (You might be left with the impression that the reason they haven't condensed this material is conventional songs is that they aren't really sure how to.) Inessential, in other words.