Pros
MongoDB hired me from a cloud implementor/builder role into a cloud security role. It was a bit of a shock having less of a direct mandate to make the changes I was used to making in previous roles. I had a lot of support in ramping up on this new way of working, including professional training. The team was wonderful and grew over the years. There's truly a "no a-holes" rule and it shows. Everyone I work very intelligent and humble. I think one of the things that really sticks out here is how much I feel supported as somebody who started a family while working at MongoDB. Many companies have a family leave policy, but it really takes the buy-in from leadership to make it work. The management went above and beyond in ensuring I was able to take care of my family when it mattered. This was unheard of in my parents' generation but now I can't even imagine what my life would have been without it.
Cons
It's been a bit more political than I anticipated. Working through other teams could be very frustrating and slow the pace of projects that would have benefitted from better coordination. There were also some instances of "knowledge inversion", where teams that were responsible for approving something knew less than the people who requested the approval.