I read the book (2009) by Jonas Jonasson a few months ago.
The film is mostly true to the book and I found it delightful and engaging. Please go and see this film. It is an homage to the elderly, particularly the elderly behaving hilariously. The Swedish have done an excellent job into making this appealing book into a charming film.
“Allan (Robert Gustafsson) is about to be honored with a 100th birthday party when, for no particular reason, he decides to climb out the window of the retirement home where he lives and do some aimless traveling. How aimless? A customer with an urgent restroom issue leaves his suitcase with Allan, who promptly boards a bus with it, not realizing it is stuffed with cash. That sets off an adventure in which he is pursued by various nefarious types, most of whom come to unfortunate ends.” — The New York Times Review May 7, 2015
Take a look at the The Guardian UK review here