First of all I must say that each individual presents alzheimer's differently. I've worked with many over the years and their families too. This is just one example of how alzheimer's may appear.
I liked the storyline up until the end when the father returned home. Some things were left hanging...ie the 2 boys who found him and especially in regards to the girl who took care of him for a few days. I do feel there was a bit more that needed to be clarified at the end.