Pros
Worked with many great people, particularly from West Coast and Toronto teams in developer outreach, graphics, and a variety of SW & HW performance engineers. Some enjoyable travel from time to time.
Cons
For me and others, observed wasted effort on projects without real follow through. Too many work hours, especially with staffing cutbacks. Saw many of best engineers leaving because of lack of performance leadership. Too many dinosaurs in middle and upper management; nice people, just didn't know how the company should be changing internally to compete. Too many folks don't understand how and why hardware gets bought. ATI integration took WAY too long and why oh why did they sell the handheld graphics unit ?! And they hitched the wagon to MSFT, should have supported Android years ago!