Pros
They will get you a job and recognize that you have the skills necessary for the particular position.
Cons
Recruiters represent the clients poorly. Their hiring process is one the slowest I have ever seen. A couple of people started their interview process in September, but did not start working until December. We had to help the 3rd party with our background check process as Insight Global was not able to represent us and be more proactive. The background check took nearly a month. Finally, once they tell you that you get the job, they will not provide information of when to start and what to expect until the night before. They will tell you a certain start date and will back out and change it in the last minute (the night before or better yet the morning of). I was told that if I did not hear back from them at 7am on the Monday of when I was supposed to start my job, I should assume that the start date had changed.