Pros
Palantir is a great employer that takes care of its people and is constantly thinking about how to improve the lives of its employees - adding benefits and perks as they become necessary for the employees. There is a lot of flexibility in one's role and no hard definition or box around roles/responsibilities - the most successful people are those that seize opportunities and create their own roles. In addition, Palantir has some of the smartest people I've ever met and supports important and varied missions throughout the government and commercial sectors.
Cons
Palantir is growing exponentially which means that the needs, roles, structures, etc are constantly changing and evolving. For someone who craves order and structure and wants it to remain the same, Palantir can be a difficult environment.