Hi,
Just curious, please don't take offense. Why would you take an assignment in tele with only marginal skills? I am a physical Rehab nurse with minimal med/surg experience and would never even think of talking to anyone out of my comfort zone. I have had a couple of assignments with ATSP and have not had any problems, but then no company can say they haven't had a bad relationship with someone at one time or another. Companies have offered me jobs at hospitals on units where I didn't think I had the skills and I didn't even interview with the hospital. You just have to be very choosy about how, and who, you interview with.
The best thing is to check out a company and have everything in writing. Good Luck to you.