Pros
The compensation and benefits are solid. If you have ever worked in a corporate environment, you are good at what you do and you have a strong work ethic, you will be fine. If you know better than to buy into standard corporate lies such as "we are a family ...treat each other with grace ... we value the whole person" you will also be fine. Operate as if you are in a well paying job where they do not care about you as a person (let them think believe it all) and you will fit in well and even enjoy the many perks and benefits.
Cons
Hellman & Friedman is very good at selling an image. It is just that, an image. They have all of the standard personalities, cliques, ridiculous policies and managerial issues that any other professional firm has. They simply have enough money to make it appear that they are somehow different, caring and kind. They pretend to care about diversity. They do not. There virtually no BIPOC in senior leadership or managment and there are a cursory number of BIPOC individuals who are not in support roles.