I suggest to write down some major questions that you want to ask. I would ask on how aggressive they are in protocol and protocol development. What is the average turnover rate at their service, career ladder, continuing education, uniform allowance, etc.
Nobody want to adress pay, but be sure that you fully understand the amount, the number of hours you will be receiving per shift, benefit packages (insurance-medical, dental, family: retirement, 401K). Will they assist or reimburse for schooling, etc. If you are in school, what is the chances of progression to an advance level.
Ask where they see the company in five years, ten years, etc. Why would they recommend this company to anyone? What is the patient satisfaction, etc..
Don't be afraid to ask, remember you are selling yourself, but as well they should be selling to you as well.
Good luck,
R/r911