Pros
Met some interesting people, had some interesting conversations.
Cons
Was constantly hearing bad stories about upper management. I only experienced the CEO expressing minor annoyance and paranoia a couple of times. My line manager always seemed to be treading water, fixated on dev-ops ceremonies, and didn't respect the opinions of his peers. The guy who was the "expert" for my field practised management by spreadsheet and was completely out of his depth, always obsessing about his approach to the work and inflicting his opinion on everyone else. Spent too much time having to plan for travel or hear about everyone's travel plans. Wasted so much time in the company's ongoing recruitment drive which pushes most of the work of interviewing and filtering candidates onto regular employees.