Pros
Envisioned CEO. JHH is full of passion, and always looks ahead of the crisis. Cutting-edge technology, smart pals, open and transparent culture. Full-of-go-go attitude in most of the teams/departments (except for facility & C&B). Local HR did a good job, even better than global HR. You can always find a piece of work that you are interested in, if you are not super picky. The benefits, health care etc. is valuable, although the compensation is so-so. There are so many legendary gurus (in US) that you can turn to, and usually they are nice to a junior. First line managers are nice and professional.
Cons
Matrix management sucks. I don't think site management understand nor care about the project progress or technical challenges. All they care about is just hire more people. Local facility is poor. Bad planning and execution. Sucking attitude to employees. Why they are not performance reviewed by a local manager? IT policies are confusing and de-productive. I felt I'm not respected when my request to access a technical document is rejected due to "IT policies". Glass ceiling for senior members.