Pros
Even though its a contract company, you still receive a decent salary. If you're on a contract with a big time Pharma company then it is a good...but by no means great place to work. If its a smaller pharma company with relatively unknown products, they will treat you like a step-child. However, pay-checks still come in and its a job.
Cons
As a sales rep, absolutely no where to go, as close to zero growth opportunities as you can get. Benefits are weak but not terrible. Limited meetings, if any at all. Hardly any fun competitions, no high performance clubs or incentives depending on what contract you're on. This is mostly a dead end for most young professionals. If you need something temporarily or to finish the last couple years of your career until retirement, this is a good place to work. If you're looking for a good company culture, growth/career opportunities, long-term employment...THIS IS NOT THE PLACE FOR YOU. However, working here is better than unemployment so Syneos has that working for them.