Pros
The location is pretty good. The canteen is only mediocre (as opposed to the downright awful you would rightfully expect). There is free soda. The office supplies cabinets are well stocked. The benefits package is reasonable.
Cons
The overall mood at the company HQ is stagnation to the point of being ridiculously anachronistic. From the old school telephone booths (visible from the lobby), through to the glass plaques dated 2004, to the company mural (last updated 2006) every corridor and office in the place reeks of neglect. Not much of significance happens here. Sure, software (eventually) gets written, deals (somehow) get done, the bins get cleaned, everyone shows up every day, the heating system works - but it's like Groundhog day. Nothing actually progresses. Meanwhile, the cash pile from the Microsoft settlement dwindles and the C-level management take home their big ass paychecks. That's the deal here. Don't rock the boat. Pick somewhere else to make a mark, kiddo.