Pros: a few exciting projects
Cons: too much bureaucracy
Typical day starts at 9ish until you are tired, until you feel your productivity is not on par with you as you want it to be.
Your merit carries a lot of your weight, however your expression can carry you further, if you are not good at public speaking, you should think twice to join SI.
Management is little inefficient here, could be improved. You would not see your boss for two weeks, however he has the authority to have your review every year.
Your boss should trust you that you would not fumble, especially after 6 years of track record which should speak something about your work ethics and your work style.
When your project is working as you have planned it, with less worry about the "he said -she said".