I'm not a fan of the mystery genre but this anime is by no means boring... The episodes are simple but lots of development comes about.
I think Senjougahara's coldness is incredibly enticing.
The characters although their back stories are brief until you get more into the monogatari series, have good depth and are good for deepening the meaning in the story.
The only thing I dislike(But like at the same time) about the monogatari series is that there is no set order to watch it in, so sometimes you'll be missing bit of information while watching one of the stories and become totally lost.- Then again when I finally learn the info from another story in the series it fits together like a puzzle and is quite satisfying.
I see lots of people rating this as a 9 or 10 but personally I think the overall score is maybe a 7; But due to the fact that you constantly have to be thinking to understand what is happening throughout the stories it gives it a psychological edge... for that the Overall score for me is an 8.
Stories: 10
Characters: 9
Art: 6.5
Sound: 8
Enjoyment: 8
