As the blurb in the Italian edition says, the narrative balance is basically perfect: perfectly balancing emotion and detachment - a tale in which there is not one comma too many, nor one too few. 
I agree with this but I would add the author also manages to create suspense and expectation, even though there are no hints about the character’s future movements or actions. The writing style is impeccable although the translation was not ideal at points. The reflection Isherwood makes about life and death are particularly original and thought provoking, and I will never cease being amazed at writers who manage to change their styles depending on the character’s situation (e.g. a drunk George vs a sober George). I very much do not think I was the intended audience of this book; it managed to teach me something nonetheless. It has been a pleasure to spend time with George.