I’m a Commonwealth employee and here are some pros/cons in my opinion:

Pros: Union representation (some are better than others), benefits are decent, after a few years you start to accumulate a lot of time off, tuition perks/scholarship opportunities (also for dependents) at state schools, holidays off (if not holiday pay), cheap add on insurance (life, short and long term disability plans), most positions you can retire earlier than the in private sector and there is a pension/401K hybrid plan for new employees (I’m grandfathers into the older straight pension) 6 weeks paid parental (either parent or both if they are both COPA employees) leave for birth/adoption, ability to transfer to other state positions and locations, and an assistance program for employees that covers some financial planning/legal consult and counseling services

Cons: Hiring process, pay is decent for some areas of PA but higher COL areas it isn’t competitive, normal bureaucracy stuff

Edit: Also most positions qualify for PSLF if you have loans.