This was extremely hard to watch for me, and also to write a review, because my mother heard exactly the same diagnosis - and there was one scene in the film that came very close to how my mother died.
Mother-daughter-relationships are also at the centre of this film, not all of them are good or even resolved at all.
So, if you're also sensitive to the topics in this film -- late-stage cancer, death of a parent, mother-daughter-relationships - then you might want to avoid it.

That being said, the actors are excellent! This is one of the reasons I couldn't not finish the film, because the actors, child actress included, portrayed their characters so well that I was already invested in their story and needed to know how it all ends.

Regarding the story, apart from my personal hang-ups: The three main characters, are all female -- and they are who are shown as the ones who shape the family, who take on the challenges life throws at them -- while the men are more passive, even weak.
The thing is, the mother is shown too much as the "self-sacrificing prototype", which really got on my nerves after a while. I wish the mother had been given a bit more time for her own struggles, her own pain, her own grief for having to leave her family. There was only one scene, right after she heard her diagnosis, when she broke down, alone in the hot bath (excellently filmed, btw), and then, once, near the end. All of the rest showed her being dedicated to her growing family -- but a mother is also a person with her own life, and I really wish the writer had given her that. It wouldn't even have taken a lot, maybe just her wiping away a stray tear, looking at an old photo, hugging herself in the kitchen ... just show us that there's more to her than just "devoted mother".

Overall, I can see how many people would love this film, even maybe find solace in it -- and most of the aspects I did not like are more related to myself than to the film -- so if you think you can watch something with the above-mentioned topics, then you should definitely try this one.