Pros
Cool work, get to (one day maybe) launch a rocket and do amazing work that will advance the future of spaceflight. Many great co-workers, amazing to work with all the old shuttle engineers and people from all over the country in the space industry. Overtime pay is nice touch, you work a lot of hours so getting straight pay as an engineer is a nice touch.
Cons
Low salaries, low raises, no negotiation. Even with another job offer management wont even try to negotiate as if this is the greatest job in the world. Many bad employees that do nothing, and get the same bonuses/raises as everyone else because management doesnt care/doesnt do anything. Some should just be fired but they wont even talk to them about their performance. Constant struggle of "were behind, work more hours" with nobody trying to correct the problems at their source. Just throw more hours at it.