Put another way...
This is heavy, tight, sludge-metal brutality.
Great songwriting. I mean, -(16)- perfectly switches things up between songs and especially within the songs. Not many can do what they do.
How they write these songs is demonstrative of their prowess.
One of the most powerful records I've heard in a long time.
Take the heaviest pieces of Buzzoven, Eyehategod, Melvins and Pentagram and you will have an idea of what 16 are about. But not quite, because this is 16 and they don't sound exactly like any of those bands. Hell there is even some St. Vitus in there, but completely altered. But I know something started there and they evolved from it...
Check out the video for "Peaches, Cream and the Placenta":
And it doesn't stop. It becomes quite punishing. Listening to the entirety of "Lifespan of a Moth" will take you on a very heavy, frightening, powerful trip.