Pros
You will meet a multicultural group of people who will be really friendly and will help you settle in and work on from there. Eimear, the HR generalist is really available and helpful during your contract length. The burn room guys will take care of your issue if they are not bothered with Destiny ;) Paula, at the front desk knows more than you need to know. The most important experience I am grateful for in Activision was that everything was structured and well managed. The QA leads were always there to help you out. There was never any pressure and yet things got done at the end of the project, the team management was done exceptionally well here.
Cons
The contract length. You get ridiculously short contract and then you never know if it is going to be extended. Even if you ask in advance, they will never know and will hold you back. Even for a few days. It would be great to know in a couple of weeks advance if your contract is going to be extended or not. No fair play here.