I didn't like the previous album The Negation that much, so I didn't expect anything whatsoever from the Poles. Decapitated have evolved and taken a small turn in direction. I can't say this make me appreciate the new material more, but the band displays some interesting angles in songs like "A Poem About an Old Prison Man" and "Day 69", but somehow it all tend to end up being a bit too blurry and noisy. The switch of vocalists is an asset as Covan sound far more brutal than Sauron did.
The music is still very much semi-technical death metal, but the band flirt a bit with noise. The songwriting appear better on Organic Hallucinosis than on the predecessor. The songs seem a lot more memorable compared to The Negation, but still the music often tend sound a little too much alike. Particularly the Fear Factory-like riffing in "Post[?]Organic" gets rather same-sounding quickly, but the leads do to a degree make up for this. It's like the music have more or less been built on the same structure.
Moreover the sound appears somewhat blurry which perhaps also is the biggest minus. A lot of the details seem to disappear in the soundscape. If you liked Decapitated's previous efforts, you will most likely appreciate Organic Hallucinosis, but I'm afraid I don't.