Ventajas
In general, well-paying jobs for highly educated individuals, flexible work options, professional work environment, engaging work in an important industry, and finally very good hearted, intelligent, and committed co-workers.
Desventajas
Management consistently divorced from day-to-day reality of how work products are developed (from a process and resources perspective). This negatively impacts moral and development cost and product quality. Appalling lack of accountability for resource managers; poor hiring decisions and barely any career guidance or counseling for current employees. Fundamentally, the problem is the GD culture and how it's outmoded, byzantine, and does nothing to excite or innovate. Look at Google; you may not like Google but no one would question how critical their culture is to keeping everyone focused and engaged and demonstrably appreciated. And did I say appreciated. So while most folks were denied pay increased for 3 yrs (even those who "exceeded"), the CEO gets 18 million. So 18 million for firing 2000+ people is how the company chose to spend it's money that year. Wow. I am all for profits, but when you chose to spend cash on people who just don't add value and you don't reinvest in your workforce (work culture, resource/ development, basic R&D IRAD work, health/educational benefits) then you have made it clear you do not care about the business except to plunder it for a time.
