Make sure you get experts or investigators as reputable and unbiased as you can
Perhaps that's why the social enquiry is ordered too, to go beyond dry psych results and dig into the impact on the children.
I don't get to chose anything here in France
Regarding the social enquiry, although I have absolutely nothing to hide, I'd potentially have more at stake than he would. I have the kids with me, so they'd need to inspect my house etc. Whereas he lives in a tiny apartment I have no doubt his family will make sure it is 100% safe and so on. I'm not at all worried about his apartment regarding my son, but about his crazy mood swings and rage outbursts.