Pros
When I think of Boeing, the best things I think of are how stable and interesting the work is. There is a real respect among my peers for developing each other's skills on the job, and encouraging employees to grow. For technical employees, the Technical Fellowship program opens opportunities across the enterprise to contribute to product development and analysis. My team(s) are some of the best people I know from industry or outside of work. Boeing does a great job in the hiring process of filtering problems before they get a chance to be employees.
Cons
It is sometimes difficult to get needed support during periods of high demand. Aerospace in general is a "feast or famine" industry, and working in bid and proposal or research and development one tends to suffer from uneven internal funding and hence support can be a problem. Successful employees (who work B&P or R&D) learn to develop strategies to cope with this, but it can be costly to work/life balance. I don't have any particular negatives... I feel like Boeing does a good job of measuring my worth and compensating me fairly... but that's why I'm on glassdoor (to see if that's true).