Pros
Opportunity to work with MANY technologies, flexible work schedules, and GREAT benefits. Boeing owns nearly every piece of software ever developed and in many cases Boeing is the largest owner of many pieces of software in existence. This fact alone allows Boeing employees to work closely with other technology companies on top of the line software which translates in to a great learning opportunity. Boeing also allows for flexible work schedules. Many employees work virtually a day or two a week and a few employees work 100% virtual from their homes. Plus Boeing allows for flex time where you can work extra hours one day and take the afternoon off the next. Finally, Boeing has some of the best benefits in the US. It has a huge 401K match plus a fully employer paid pension plan. This on top of their fantastic health, vision and dental insurance and no cost (in most cases) to employees.
Cons
Thing move very slowly. Boeing has a large bureaucracy to navigate to get things done. Projects can drag on for many months or even years due to the huge number of approvals that are needed to get things done. Buying new software can be a nightmare. Also Boeing is a "no-fault" work environment which is a benefit in a sense that you can't get fired for a mistake but this also translates into a lot of lazy workers who don't care about their job. Apparently you can't get fired for that either. Over the next few years, as the baby boomer generation retires from Boeing, I would expect that to change.