Pros
Many of the employees work incredibly hard to do right by the clients. You can get experience managing stress and balancing many competing priorities simultaneously.
Cons
The expectations of employees, particularly Project Managers, are quite ambitious, some might even say unrealistic. The workload placed on PMs warrants a work week averaging 50-70+ hours in exchange for a salary that would be hard-pressed to justify even half of that time commitment. When the PMs consistently manage high project numbers, and the recruiters have numerous competing priority studies to dial on, there's simply not enough time to service each client to the standard that they expect. The workload expectation has created a day-to-day cycle of catch up for PMs and recruiters. The imbalance between resources and work taken on results in an unfortunate game of damage control. A PM's attention typically goes to putting out fires on impending studies, while those being neglected eventually turn into new fires. The turnover rate is understandably high. Many PMs do not last more than a year.