Ventajas
If you're into doing spacecraft and defense products, LM has one of the best portfolios of these sorts of things. It's a large diverse company and if you're interested in moving around to different projects then that opportunity is there (but you have to make it happen for yourself). If you're truly a superstar (top 1%) you'll be treated well -- but you still won't rise as fast as you would at a smaller company.On the other hand -- you don't have to work too hard. You can put in the standard 40-hour week and still be considered a good performer. So if you've got other things in your life than work it's nice in that regard.
Desventajas
The current "affordability" climate means promotions are almost nonexistent and raises are paltry. Don't take a job thinking you'll get promoted within a few years -- your manager might want to do it but his hands are tied by HR and central management. The raises are about in line with inflation -- so not really raises. The new health plan is expensive! The glossy brochures make it sound great, but here's the summary: If you're married with kids, expect to pay $3000/year in premiums. If your family remains in perfect health all year, then that's all you'll pay. But of course that doesn't happen. Factor in some kid office visits for colds, some parent visits for this or that, or even one emergency room or urgent care visit and you'll be out of pocket another $3000. So budget for $6000/year for health care. It *is* capped -- so the $6k/year is the max you'll spend. And you can choose just about any doctor you want. But that's about the only good news.