I tried to read all documentation for bacula but not much success at all. Documentation is really unclear and for first installation unusable at all. Fortunately there are sites which can help you with configuration a lot – like How To Use Bacula on CentOS 7 . It is really straight-forward.
From what I have seen I can tell that Bacula is a really good backup system mainly for Linux. What I see as the most problematic is an incompatibilities between versions.