I adored Fredrick Backman's book so I had quite high expectations for an adaptation that did it justice. It is a very emotional and important story that deserved an appropriate portrayal. For the most part this tv show didn't disapoint. The characters were cast very well (especially maya and amat - they were exactly how i imagined them in the book) and the acting was also fantastic. I did feel, however, that five episodes wasn't enough to completely introduce all the characters. The first book went into a lot more detail, portraying the characters with significant depth.
Overall, this was a very good adaptation but I do recommend reading the book first, Backman's writing and storytelling (even being translated from swedish) is unparalleled.