Ventajas
As long as you do your work you are left alone. I'm an onsite rep so I have a lot of flexibility in work with no one over my shoulder. Pay is decent and you can negotiate at hiring.
Desventajas
There is no support from management. If you're onsite and there is a problem they will not support you for fear of losing the contract. Increase in pay is a joke unless you change positions. All training was done via phone and wasn't really mandatory. I was already do work when I was signed up for telephone trainin and therefore my work was more important and I rarely attended the training. There is no SOP so everything you learn or don't learn is due from OJT. Management only cares about the numbers the set at the bringing of the month and the incentives to reach these goals are a joke.