Pros
I worked in the former F&R team (now Refinitiv). The number one asset they have is the people. You'll find a camaraderie there that will make you enjoy going to work every day. If you're a market geek, you'll be communicating and working with some of the largest financial institutions in the world. You'll be immersed in the markets in a way that will help you learn the markets from the inside.
Cons
They struggle with really embracing diversity. Though they would really like to be seen as a diverse company, once you enter the walls you're pushed to conform to a mold. New ideas for improvement were regularly criticized and you ended up feeling like it's just better to put your head down and accept the process as is. Success there wasn't about the work you do but how well you can create a PowerPoint about the work you do (truth in the PowerPoint is optional). They also had a tendency to play musical chairs with leadership. When things were going bad, the leadership would shuffle and it was billed as a "new" change to drive innovation. The tone on this seems to be changing with the recent buy out but there's a lot of cultural change needed to undo the damage of the previous leadership. Finally, there's a massive lack of transparency from leadership. As an example, on one call, you'll be told the sales numbers are awesome. Two hours later, you'll be in another call and the numbers were awful - usually that call related to setting expectations on your bonus. It was always a struggle to figure out how (and where) we were succeeding with the leadership taking constantly varied stances on performance.