Pros
Fantastically little manager oversight. I hate being micromanaged. Give me some direction and let me work. In this way, it is great. I contract through a staffing agency, who I also never talk to. A dream. Pay is good. Expectations are low (which could be a con for some).
Cons
There is really no manager guidance, and hardly any feedback. Managers aren't allowed to meet regularly with contractors. Very hierarchical. Super slow task initiation. SUPER slow implementation. Like a six-month to one-year dev backlog. Not a good fit if you're hungry and a change-agent and live to make work processes better. Did I say slow? I meant glacial. And tribal/political. And scrumfall dysfunction. Other than that, it's great.