just about every song is an overly long drone in a minor key. Honestly their creativity peaked in their first two major albums, Winter Ray (which is a majorly overlooked post rock masterpiece, especially the first half) and Dance of the Moon and the Sun, which is undoubtedly their magnum opus. If you've heard both those, along with Shadow Kingdom, and you're in the mood for some ultra depressive minor key drone, then its probably worth a track or two. The whole album start to finish would just be a chore.
Also highly recommend their 2014 album "The Night Country", its easily in their top 5, and more similar to DOTMATS than most of their other work. Centauri Agent is also great.