I underwent a Ryanair interview/selection for a DEC position. The person who interviewed me was a shifty, devious little O'Leary clone who couldn't look me in the eye and wouldn't give me a direct answer to any of the pertinent questions I posed. My suggestion that I'd like answers and I'd like to see them in writing almost gave him a heart attack.
They didn't offer me a job - it didn't matter, I eventually had four options from which to choose, all from much more ethical companies.
Do not go there unless you have absolutely no other choice. If you must, seek to leave at the earliest opportunity.