Pros
Satisfying work - you're helping make products that have a tremendous positive impact on patients. Overall, coworkers are smart, highly motivated, and very pleasant people. (Note - this review is based on much experience with the company in North Carolina, and some in California).
Cons
Decisions are made in Spain, often without consulting with executives or managers in the USA. This results in chaos and eventual backpedaling when decisions are announced. The company does NOT treat its USA employees with respect. At the same time as the global CEO was touting how the company had increased salaries (presumably in Spain, although that was not stated), compensation for between a third and a half of the USA workforce was cut, mostly through reductions to bonus targets and eliminating company paid short term disability. As the company continues to trim some parts of its workforce after the acquisition of Talecris, they are circumventing the severance plan and instead dismissing uneeded people by making up performance issues and terminating for cause (hard to know the extent of this, but I know of several cases where long-term, well respected employees were pushed out in this manner). In some parts of the company, not surprisingly, stress levels are very high, and morale poor. Some people have had health issues related to stress.