Pros
Pearson has great benefits and a lot of great people working for the company. Employees seem to share passion for what the company is trying to do. The CEO visits many of the major offices every year and says that we're working to make education better, not to make profits. She says that profits are what allows us to do great things, but our primary goal should be improving education of children and adults globally. She's a solid thinker and highly admirable.
Cons
The pay for most positions seems to be a little below market value, but there are very good benefits (tuition reimbursement, 401K matching, medical/dental/vision/life insurance at very affordable rates, lots of opportunity). It can be a real issue getting people's salaries to market value once they're in the system, but I don't think that's too different from anywhere else. Sometimes you have to work long hours, but it's nothing like working at places like Google or Apple.