It's rare in a company that you get to work with so many smart and talented people everyday. Google provides that for you through its rigor in filtering and delivers amazing colleagues.
Once you're in it's all about finding opportunities to make impact even if it means you spend a whole quarter to prove it. You get to be choosey with your goals and take your time. Managers are very supportive of helping you feel you've delivered value by the end of the quarter.
Then when you do leave, the alumni network is unmatched.
My recommendation is to do what you need to get in even if it means taking a lower tier job.
Learn the Google way, what it means to be "Googley" and see how you can navigate your career from within the org.
My biggest regret is jumping to a startup right after. It's like going from building cities with girders and machines to building model homes out of toothpicks.
Smart colleagues. Shares with real value.
Slow pace. Ex consultants are ruining the culture. Ivy League FOMO.