(Warning: I'm not fully bilingual, so please forgive me for my poor English vocabulary) This one was awful from start to finish! There was no notable action: the main characters were in a big investigation, full of dull dialogues, and the creature was just wandering around in the sewers doing some cheap kills once in a while, nothing too original, entertaining or gory.
Not absolutely painful, just plain boring.
If you want to see something a little better with the same creature, try Syngenor instead. I'm a big fan of the genre, especially the "so bad it's good" sub-genre, but this one is definitely not in that league. Avoid.