Pros
There are great people who work there. I truly enjoyed working with other employees and felt that CC had many smart, kind, and great individuals in Tier 1, 2 and 3 support, as well as dev.
Cons
The employees, particularly those working in support, are treated like machines. Breaks and lunches are monitored. Calls are monitored and criticized if they take more than about 8 or 9 minutes on average. Support staff are forced to shoe-horn up-sells into calls. The pay for the amount of work would make a plebeian laborer weep in pity if they witnessed the amount of grief given for the rate of pay. Others have mentioned that you have to be 'in' with someone to be considered for other jobs. There are plenty of opportunities, but the process is extremely frustrating if you don't have an 'in.'