Pros
Solid, well established company. Certain positions allow for flexibility as long as you have a good work ethic and do not take advantage. You typically need to have proven yourself to attain this luxury. Certain circles/groups have dedicated, hard-working people associated with it. There's a lot of experienced, knowledgeable, genuine people here. Some room for advancement to a certain point.
Cons
This company is a perfect example of the adage "20% of employees do 80% of the work". It's a top-heavy company. I am not disgruntled - I am in a respectable position and have received promotions over the years due to my hard work and reputation, but that doesn't mean there's no negative aspects of the company. I am part of a very successful business segment but have seen less and less appreciation over the past few years. Salary does not grow in relation to cost of living. Raises average 2-3% but are heavily offset by increases in health-care contributions. When an employee leaves, they are not replaced. Many people you speak to are salary-based and over-worked. You are not "forced" to work longer hours but if you want to be successful, meet deadlines, satisfy counterparts and maintain your reputation, you need to. New employees coming from the outside have much more salary potential. Tyco has an unwritten policy of not allowing increases greater than 5% even when changing positions and taking a promotion (except senior management, I'm fairly certain). In fairness, I am basing this review on working for Tyco. Tyco recently merged with Johnson Controls, and cannot yet say how this will affect future experience.