Pros
Honestly, there is not much good about it other than the extreme job stability. Once you pass probation, you can do anything you want and you will not even be disciplined, let alone terminated. You can choose to not produce any work output if you'd like, or you can work hard and produce work output if that's your thing. Due to the bureaucracy, it is near impossible to produce meaningful results, so the people who don't work may actually be the smart ones?
Cons
No one is held accountable for anything and management is scared to discipline employees due to the Union's power. This breeds a culture of laziness and an false sense of entitlement by most employees. Frankly, working for the State of California is a pretty sad gig - just watching tax dollars get flushed down the toilet all day.