Pros
Boeing's education benefits are very decent for a major company. It's called the "Learning Together Program." I received my Master's in Electrical Engineering Part-time while working Full-time and Boeing covered all tuition and books. They've gotten more strict this past year so review the latest information if anything has changed. Outside of the LTP program, your group's training budget and support for professional certifications is very dependent on your manager. I always pushed for training money and was able to obtain my PMP funded by Boeing, but I had to ask for it. Boeing says that they have a mentoring program, but in my experience it is mostly in name only. Mentors are "highly encouraged" to get mentorees but there's no structure or accountability to actually DO any mentoring, and there's no attempt to connect you with mentors in similar careers outside of your own little group. This is one of the major reasons that I'm leaving. I've pretty had to self-teach myself project management, and my PM mentor was from the other company that Boeing worked with. In summary: go to Boeing when you're young, and get a higher degree. Or stay with Boeing for job security (they never fire ANYONE) and a steady paycheck, but don't expect to have challenging work unless you are constantly seeking it out, and even then you may not.
Cons
As I mentioned above, Boeing is really good for two types of people: 1) Young professionals looking for a company with a technical reputation and that will fund higher degrees, especially in engineering. 2) Established professionals who want a steady paycheck and reasonable work weeks and are ok with a not-very-innovative company culture and not-always-exciting work and don't mind that recognition for going above-and-beyond is usually limited to Boeing points, versus a nice cash bonus. It's a very good company for both of these types of people and I think if you fit one of those descriptions, you will be happy here. If you have a higher degree and are really looking to grow professionally and be challenged, I would look elsewhere.