I just finished the movie and I loved it. I loved how they kept going back and forth between past and present, it made it all made sense more and drew a great picture in my head.
Both of their acting was phenomenal, it's an extremely emotional movie which makes a bit hard to watch for some people as it mainly is all about watching how they were suffering, so if you're not into this kind of movies, you won't like it, yes.
I also didn't know that it was based off of a true story until the very end, this made me love it even more.