Pros
You get to work on products that everyone knows. It's nice being able to chat with local businesses or nieghbors about their experiences (good or bad). Fantastic company for work/life balance. New CEO, Brad Smith, is making necessary changes and setting a new, intelligent course for the company. We haven't been growing as much as we should be, and Brad's direction will change that. Excellent support for working on and considering your creative/innovative ideas. Most engineering groups get 20% of their time to work on a project of their creation. The company also runs one day competitions every month or two to provide another place for people to create new projects and get them visibility so they may get funded.
Cons
If you're not at one of the major sites your upward movement is limited. Company needs to get better at organic growth.