Pros: Challenging everyday work. Opportunities for professional growth (really, lots of tech talks, people like Sanjay Ghemawat, Rop Pike, etc. that you can talk to every day in the hallway, invited guests like Joel Spolsky, Guido van Rossum), tons of great trainings, and interesting projects). Awesome perks. Again, great people working with you. Again, people who are really enthusiastic about the work they are doing (e.g., we have weekly whisky meetings where we share and discuss work challenges, news, and achievements while having a glass of good whisky). We organize white paper read clubs and discussions, and so forth. Sergey and Larry entertaining you every Thursday, discussing what's happening in the company and answering your questions. 20% projects (they are not dead; you can always come up with creative and useful stuff, and people welcome it). Strong nerdy/engineering culture.

Cons: Google is a big company now. It's not a startup, and you won't be making millions (but you will be comfortable). Sometimes, management has product decisions that even most Googlers do not approve of.

Pros: You can learn how to do big IT things right by watching people do it wrong at scale.

Cons: Too many strongly opinionated geniuses around.

Pros: The extra perks, such as a gym and good food, are really good. The benefits and free transportation to work are a plus working for Google.

Cons: Google is a very big company with really smart people in its teams. Improving the levels is really hard unless you are a pro.