I always wanted to read this but thought I'll wait until it's complete. Now it's complete ...

I always wanted to read this but thought I'll wait until it's complete. Now it's complete but the comments are saying it's not a happy ending.
So please tell me, should I read it, should I read only to a certain chapter before the traumatic stuff happens or should I not read it at all?
I'd really appreciate your opinions ╥﹏╥