Pros
Brilliant engineers to work with. They do a really good job at hiring only the best engineers. Your coworkers know what they're doing. You can learn a lot from these people.
Cons
For reasons that are not at all clear to me, I've gotten devastating performance reviews. After the first one I asked for help from my manager to correct the issues. I asked specifically for one-on-ones to work through this. The only one-on-one I ever had with that manager was the one where I asked for the one-on-ones. I received no other feedback during the following year - good, bad or indifferent. Assuming no news is good news I thought I'd do better the next time around. Not so. He came in so animated about how bad I was doing that I thought he was joking at first. No. Still no opportunity for providing my own feedback. Still no feedback of any kind even from my new manager (who sat in on that review). I literally have no idea what I'm doing wrong or how to fix it.