It would probably be best to talk with your local colleagues. YOu may find someone from SC here but maybe not.
I worked with them in the Denver area and was NOT impressed.
Better yet, talk with the facility / facilities you want to work with and see who they use and who THEY like. You will probably get the most help from the house supervisor. I know it is like working a little in reverse but it is worth a try.
Interview, interview, interview. Make a list of the agencies pros and cons and talk.
Good luck and let us know how it is going and how we can help.
night