Pros
There are plenty of smart, good people who are a joy to work with. I personally do not work long hours so work life balance isn't bad. There is room to grow in your career if you plan to stay at Boeing a long time.
Cons
Boeing has a very toxic work culture. It rewards people for exaggerating about the success of the work that they do. Only positive information is shared with management, and failures are blamed on others. Teams point fingers at each other and never self reflect. Some teams are worked into the ground with forced overtime. There is a huge lack of respect for people. Lower level employees are completely ignored when they approach management and higher level engineers with ideas. The leadership culture is very top-down. There is a lot of pressure on management to push forward with projects in order to obtain desired metrics, at the expense of the happiness of employees. I want it to be clear: There are lots of different teams in Boeing, and the culture varies a lot between different manufacturing sites. The 737 site is struggling the most.