I loved this film.
I hadn't heard of it before watching it though, so was unaware of all the hype that I now see about it (but haven't yet read) so I had no expectations.
Just touching upon some of the comments here:
I didn't get the impression that she was mentally ill. I did feel that she was very socially clumsy sometimes - the way she quite firmly asked Lyle to leave her alone to finish her dinner, but then crept over, whispered something in Italian and then scurried off?! Or the conversation about breast size with Will?
I found a lot of the flashback scenes quite uncomfortable. The tiredness and the quick to anger possibly hinting at PND? I could see the spiral between the kids getting clingier the more she pulled away from them, but the clingier they got the more she just couldn't stand it. That was painful but it resonated a lot and both the acting and directing were superb.
At first I thought one of her kids had gone missing at the beach and died. Martha called her on her mobile but you only once saw the other ones (her name has gone right out my head) name/number on Ledas mobile screen. So she talked about them both a lot, but I suspected that the other one had died as a child and Leda was in some sort of denial in talking about her as an adult.
So it came as a surprise to me that she had actually just left them.
I don't know what to make of that. I think it's great to show something that men often do being done by a woman for once.
I don't know what I think of Leda. I do have a lot of sympathy for young Leda. You can clearly see the pressure she is under.
Older Leda, I'm not sure. I think she was invisible as a middle aged woman though. And I don't think she liked that. She was invisible when they expected her to move on the beach and invisible at the cinema, even when she kicked up a fuss.
When Nina asked why she went back to her kids and she said because she missed them then conceded that she is selfish. Ie she went back for her benefit, not theirs, I didn't have sympathy for her.