I had the same experience as Thread. Even if you ask before starting is always "ok" and when you are flying the SIM they are upset if you do or order what was said before. I did not feel doing a bad performance but I guess they want everything as they "want". CRM is not good. The "checker" was allright but my cpt was difficult to understand even though I asked a few times, when Reading checklist I had to ask him a few times too.... and he looked really pissed. Maybe because he was 2days in a row hours seated there and I was one of the last ones....bad luck too.
I will try it again if they give me a second chance. I still work, fly and that's fine for me...