Oh I didn't like this. At all.
I thought this was hollow, bland, empty, calculated, I found there no traces of humanity or love, no emotion whatsoever. The only thing I really wanted was for these characters to go away and the movie to come to an end. It was painful. The subject is obviously hard and all, universal and it affects us all one way or the other, but the problem was that I could not relate to these characters at all (and I saw my mom getting sicker and sicker for two years before she died when I was 11, so it's not like I can't relate to things like that on a personal level). Their isolation is so baffling. It all starts with them getting home and seeing someone tried to breaking in and their reaction is "yeah, let's go to bed". It felt very detached. In a way my reaction to the couple was the same: "okay, go away, bye". I can't say more about anything else because I was too distracted feeling nothing for these characters. I felt they (film, characters, Haneke) didn't want me there and I reacted the same way, I didn't want to be there, I didn't want to watch this journey.
The acting though is obviously very good.