It is worth watching or reading. It's sort of a dark comedy due to the fact that most of us are represented as characters in this series. If you can't laugh in this series at least once, then you truly have a sad life.
Some people cannot watch this without realizing that their life is shit. I say to those who avoid watching or reading this series that they are IN serious denial.
This series is a reflection of our very lives and the majority of anime fans will not attempt to truly understand it. Anime is an escape from reality, this is the exception.