We get the HIMS presentation in yearly training. In recent years we've been told that once you report, you can't get any protection from prosecution and termination through HIMS.
Part of AQP recurrent this year was to watch a well put together video about the company's HIMS program. It had a couple of pilots who used the program, one of whom I know well who failed a post flight breathalyzer. He was immediately fired, sought HIMS assistance and something like 18 months later was back on line.