Pros
good for very young or very old people. Can literally wear shorts and a tee-shirt to work. Flexibility with hours and assignments Managers are generally accommodating and are willing to bend rules for the benefit of employees Managers don't mind if you listen to music while you work Gives you experience for other jobs
Cons
No room for advancement. Benefits come after a year. Low pay. Work is monotonous. Work is by contract and not guaranteed You are basically working for Westats internal temp agency. If you need consistent pay or expect raises look elsewhere. These jobs are really more for people who either don't really need work (i.e retired, parents) or are too inexperienced to find higher paying positions. You are a second class employee. No vacation, no paid leave other than sick.