Pros
Pay was excellent. Benefits were better than most other companies i've heard of. Opportunities for advancement were available and training available. Good work location. Vast majority of supervisors were very helpful and easy to work with, you wanted to do everything you could to do a good job for them.
Cons
Difficult rotating schedule, hard to balance work life working nights every other week though rotating 12's give a lot of time off every month. Highly regulated NRC atmosphere creates unnecessary stress, don't you dare make any tiny mistake. Training was thorough and contained lots of very useful information but could be implemented better and be more focused on daily operations. Testing was used as a means of threatening job status if can't maintain 80% average. Management became more and more military like and didn't listen to lower peons. Union atmosphere was ridiculous, it's much better to work with the company more like adults and not squabble over ridiculous details. After 6 yrs working in a union I officially hate unions and think they are the cause of many problems in companies, though with a union you will get very good pay and benefits that may not even make any sense and can bring a company down into ruin.