What has your experience with Recruiters been like?

Hi All!
I am currently looking for a job in a new field of nursing, and I am curious to see what you all have to say about recruiters(office based, not in hospitals). How helpful have they been to you? Do they seem to focus on your needs and desired position or do they just plug you in for whatever position there may be. Any feedback on your experience with recruiters you can offer, I'd very much appreciate!!!!