Pros
Company is filled with some of the smartest people in the industry Hot core technology that continues to gain market share, and blow away competition Customer base that loves the company Some cool visible perks that make it seem like a sexy company to work for -- free drinks, cool campus, etc. You really feel like you might be changing the way the (IT) world works
Cons
Advancement in this company from within is simply impossible. Regardless of your accomplishments, talent, or skill level, you likely will not move upwards from the role you were hired for without an act of God. You are a cog, and they will not move you from that role. Absolutely no career development -- no opportunity to work on projects outside your area, gain new skills or -- God forbid -- get training in an entirely new area. Forget going to outside classes. Sweatshop mentality has become the norm New leadership bringing in management from outside (cronies) that are less competent than internal candidates Arrogant attitude from senior management about "knowing what's best" for the company, yet reluctant to hear candid feedback Serious disconnect between achievement and reward for performance The pay just isn't that much better than working at a boring company with no growth (and a lot less work). You can be a cog elsewhere, with less stress and fewer politics.