Pros
There are many pockets of great technology, hard problems to solve, and great engineers working on those problems. The compensation is very good, and basic business practices are solid (functions like HR, facilities, procurement, and so on are well run). If you are motivated, you will be rewarded and recognized by management. Honestly, the biggest draw is that Boeing has it's fingers in so many great technical areas, and there is room to excel.
Cons
With Chadwick being replaced by Caret, the company has shifted strategy from quality to cost. Extremely deep staffing cuts have left bare bone teams unable to execute on the work. Phrases like "it makes me feel like a slimey contractor, but..." or "just check the box, it doesn't have to work" are frequently heard from PMs on the verge of panic attacks trying to meet budget. The customer focus that created our best products has been suppressed, and the only way to protect the quality of your product is to work nights and weekends. You will be quickly promoted if you do the work, and the pay is great, but the instant you triage an issue, you move on and the product you worked on sits abandoned to die a slow death. Management talks about employee development, but all they want are leaders. They never let you learn new technical skills, instead that make you run increasingly large teams until all your time is spent organizing the schedule tasks of rushed, low quality projects which barely squeak by through heroic hacks and last minute work arounds.