Pros
Northwestern is a great university with lots of academic resources and high-quality research. Working here provides the opportunity to interact with very intelligent, prominent professionals from the academic world. Interdepartmental collaboration is particularly strong and a great way to promote advancements and innovations in research. If you are looking to do research, you will find lots of opportunities here.
Cons
HR and administration are sometimes really unhelpful and disorganized, depending on your department. My department has a lot of issues with poor communication between employees and administration, with administrators ignoring lots of requests from employees. There is also a good deal of academic snobbery that goes on among the higher-ups.