Really good watch, would watch again and can recommend.
Sometimes, it's important to watch movies with actors of which you're less of a fan. It lowers your expectations and reminds you of their true, objective acting talent.
This is a very interesting watch on the real life symptoms and side effects of sociopathy and/or repressed psychopathy. It's the time of psych thriller that is scary because it could be happening to you in your own home. It doesn't mean you're stupid / not perceptive or they're super smart / devious. It just means that they're (at least) slightly more calculated than you.
There is a slew of metaphors in here from equals in a relationship to the upper class lording over their lessers, but there is a pivotal moment where they could have expressly made it about men vs women, and it (very obviously) did not turn down that road.
Really, if you like pysch thrillers, put this in your queue, I think you'll enjoy it.