I read it some 20 years ago when studying philosophy.
As far as I remember it is basically a compilation of the thoughts of other writers and school, and as such valuable and interesting to students of the history of philosophy, even if it might not be totally reliable.
However, it is also rather dry and a bit suffering from verbosity, so if scepticism is your whisky, I think you might as well turn to that fine and spiritual writer David Hume.