Pros
You will quickly expand your network and meet many new people due to the revolving-door of hiring and firing, constant reductions in force and regime change. If you know how to look busy, play politics, have no aspirations and are a yes-person, you can subsist here indefinitely. You will learn how to handle leaders who are sociopaths and bullies and thus be able to identify and avoid them going forward. You will enhance your ability to know when your managers are lying to you. You will learn how to sleuth out details about the company's decisions and processes despite all attempts to keep you in the dark. You will become a pro at short-term survival despite awful communication, lack of direction, conflicting strategies and constant subversion. You will become adept at personal budgeting as you will not receive a salary increase regardless of your performance.
Cons
I honestly can't think of a single "con" about this company. Everything I could express is in the "pros" section for your review.