Pros
You will learn a lot especially if you're willing and hardworking. Very generous with paid time off(at least before it was bought by Centene).
Cons
Management separates themselves from regular employees. If you will get promoted as a Supervisor or Manager, they will tell you upfront that you cannot hangout with your coworkers anymore at work if they are your friends. Favoritism is very obvious at the Membership Department. The people that get promoted are their friends or other manager's friends and relatives. While they say they cannot give their employees a raise, you will notice that they keep promoting their favorites almost every year. Also, the Membership Department is known for managers that micro-manage and is know for being a grade school kind of managing.