When I worked through them on a job, they were not transparent with how much my pay was with the company. When discussing it with my manager, he was upset as he was told I was receiving a higher wage and had to follow up with Robert half. They now don’t use them.
Also, none of the recruiters actually recruit. They post jobs and you apply. That was how I landed mine. When I recently tried working with several recruiters on potential jobs, I never heard back from any of them after the initial meeting.