At MX there was a clear set of values that started with customer service. It was clear to everybody that life is too short if you can't provide a useful product and service to people. The CEO talked ad nausum about the Customer Golden Rule: Do to our customers what we would have them do to us. We were expected to live it every day.
Cons
Highly pressured with a "throw it up on the wall to see if it sticks" approach. There were times where one wished there was more structure. But at the same time the constant experimentation lent itself to an exciting atmosphere where anything was possible.
I think supervisors had a lot on their plate and were given other responsibilities from mgmt. so the reps that were on the phone didn't have help from supervisor right away
Cons
worked in call center. overall good experience. support from management and great supervisor