Pros
I made some of the best friends of my life working at the British Museum. Wonderful, authentic people, cross-team kindness and a nurturing environment, lots of soft support available, free entry to exhibitions and around the city, staff canteen, staff parties, and a Christmas sale. Strong Unions, beautiful building. Colleagues for life.
Cons
Heirarchical structure with engendered mysogeny, depends who your boss is and your team culture, HR can be very slow to respond proactively to things. I got a new boss who was genuinely a bully and created one of the worst professional experiences I have ever had in my 10+year career, with a few employers. I can't believe they got hired, I am the third person to leave my longstanding team in three months.