Pros
Honestly the coworkers were the best part. Smart, easygoing, and pretty much everyone I worked with was someone I'd grab lunch with again. Managers I had were also solid, they actually tried to listen and go to bat for their reports, which is more than I can say for a lot of places. Bouncing between a couple teams during my time there did give me decent exposure to different parts of the codebase, so I picked up a wider skill set than I probably would've otherwise. The mission is something you can feel good about too, which counts for something on the days when nothing else is going right.
Cons
The work itself was just... messy. Priorities shifted constantly, ownership across teams was fuzzy, and a lot of what should have been straightforward turned into multi-week detours because nobody knew who was supposed to be doing what. Got moved teams more than once without a ton of explanation, which made it really hard to build momentum on anything meaningful. Engineering processes felt held together with tape in a lot of places, and tech debt rarely got real attention because there was always some new fire to fight. If you like predictable, well-scoped work, this isn't it.