Pros
The work isn't as hard as it should be. If everything goes well mechanically, a typical day can be easy.
Cons
The better you do, the more they take. Ambitious people get shot down while slackers get the same raises. Work life balance is the worst part. They give a lot of PTO but I work 2 weeks in a row before getting 1 day off. The average M-F work week person with two weeks of vacation gets way more days off than the typical Pfizer slave who has to work for weeks on end before getting a natural day off. So many rules set in place to make it hard to use all that PTO they wave in front of your face. Its all a joke. Mega-corporations are good at giving the illusion of choice and good benefits while stomping their most important colleagues into the ground.