I believe the lyrics on here aren't actually particularly interesting for Rammstein standards, I just really like the sounds. The compositions itself are pretty straightforward, but they somehow consistently manage to include stuff that just seem weird and out of place on paper (whistling, children's choir...) but is executed extremely well. I could jam to Engel all day.
Karlheinz Stockhausen was a great mind generally speaking, but this still sounds like total shit. Some bits are halfway interesting but apart from that it's just a random noises and, to me, the bare minimum of what I can even consider music. If anything, this feels like Karlheinz's sandbox. Still, 10 points because I could see this working very well in an atmospheric horror game or movie, I guess.