Pros
I can say that I worked with a lot of smart people who took their jobs and their duty seriously. There's no lack of passion for the customer and balancing "do the right thing for the customer" with operating safely within the regulatory requirements. As consumer I feel very confident that Experian is safeguarding my personal information and they have good procedures in place to run a stable data warehousing operation.
Cons
Experian can't get anything done, I still scratch my head wondering how they consider themselves "innovative" - completely ineffective at executing with any sense of urgency. Lots of issues with architecture - something breaks on one product that takes down four other seemingly unrelated products with it. There's a constant sense of frenetic chaos - methodical, thoughtful planning & execution is completely lacking at execution (part of the reason why nothing ever gets done). Above all that, my lasting impression is that Experian does a really good job at hiring the wrong people for the role, keeping around bad apples FAR too long and promoting people who are clearly unfit for their current (let alone new) role. It's completely demoralizing and demotivating.