Pros
Unless you're in a position where you travel, the work-life balance is good and the benefits (except for salary) are just really great. If you love to be challenged, you definitely have possibilities.
Cons
Too many acquisitions make the company feel like a patchwork. Working environment can be soooo different from one office to the other. The company being global, you keep working with people you never meet; it's easy to get the feeling that you are just another drop in the ocean. The only way to increase your income is to get a promotion, so people either get "fake" job titles (created by the manager to justify the raise) or get promoted to positions where they don't belong. The higher management changes very often too, you get the feeling they are disposable - no long term vision there.