Pros: If you are an engineer, it's wonderful. The place is built by engineers, for engineers. The company's rules, structure, and processes usually make sense, and when they don't, anyone can fix them if they can get enough people to reach a consensus. Promotions sometimes seem very difficult, but are well-earned and very fair.

Cons: They don't suffer fools. If you move into an area that is not your strength, you can be penalized. A move from engineering to project management might take someone six months to get up to speed. In that time, they may be given only "adequate" performance reviews. All companies have 'dull jobs' that are hard to automate. Google only hires the 'best and brightest', which means some people can be really bored.

Pros: Perks and benefits galore. Google has incredible health plans, retirement plans, and paternity leave. Coworkers are extremely bright. Lots of fun facilities. I prefer the flat corporate structure.

Cons: Google has an enormous codebase. Lots of jobs are just doing maintenance to keep your service up with the many internal monolithic tools that are constantly being deprecated. Solutions tend to be overwrought in order to "demonstrate complexity" for promotion committees. So much competition when you are basically a cog can be discouraging. Many coworkers work in evenings and weekends. There is no 20% time. It is really difficult to get promoted when there are very few open slots.

Pros: Salary, work interest, perks, hours, management

Cons: None I can think of.