Google – “Good experience as long as it lasts”

Pros

+Very collegial culture
+Awesome perks
+Great place to work if you find the right team/manager combination
+Lots of flexibility in how you want to design your objectives and do your job

Cons

-Significantly different experience across teams
-Very important to have a strong manager who is willing to champion your career progression, etc; often leads to situations where work is ignored if manager is busy pushing personal agenda
-Strong disparity in talent at international offices; greatly insecure senior management in some teams who wouldn't mind stepping over their team members and misrepresenting info upwards

Advice to Senior Management

Spend some time defining career paths
Make internal mobility across teams easier (even if it is to one of the "sacred" teams such as the Product Management team)
Keep up the good work of designing and launching breakthrough products and technology