Pros
Fun environment, lots of social activities, free breakfast or lunch once a month, depending on your manager they are flexible when you need time off for appointments, etc. Annual bonus. Most are able to work from home when desired. Christmas off. Great clients.
Cons
Workload is unmanageable more times than it should be, expected to do so much more than your pay or job description matches. Too much inconsistency in the way things are done, everyone seems to have a different way of doing the same thing that often leads to confusion. Management makes a lot of quick decisions without thinking everything through and/or informing/questioning departments that can be affected, then there is a mad scramble to clean up issues that should have been taken care of or addressed before the quick decisions were made.