Pros
The premise that labor unions were founded upon is fair and just. Fair wages and benefits to provide all with a quality of life everyone should have opportunity to achieve.
Cons
While pay and benefits are very good, particularly as compared to other, non-members within the same sector, it's never good enough. Entitlement and complacency run rampant.
Pros
Once you get them great benefits.
Cons
Construction schedule, waking up early will be your life.