Pros
MasterCard under the leadership of Ajay Banga is trying to be a payments technology innovator and leader. This vision is working, as evidenced by amazing stock growth. Many of the newer people that they have hired are go-getters with great backgrounds who will work tirelessly to fulfill this vision. I enjoyed my years at this company and learned lots from very smart co-workers who came from McKinsey and BCG as well as Silicon Valley startups. The company is innovative and fairly nimble given its size. It was a pleasure to work there (most of the time) and I would probably go back for the right opportunity.
Cons
Beware of people who have been at the company more than 10 years. There are lots of them. These people are "old school MasterCard." They are not particularly innovative or aggressive, and they have little to no desire to find new ways to solve problems. They clock in and clock out, collecting a decent salary and bonus. They live nearby and like having an easy commute and treat their roles like a 9 to 5 country club. Mr. Banga seems to be aware of these leeches and slowly but surely a few of them get laid off each year. Just don't make the mistake of working for one of them. It will just take you that much longer to get where you need to be. This happened to me, twice, and therefore I moved on.