Excellent film - prerequisites are an open mind and an appreciation of life.

Rating: 10/10 (19 November 2014)

***Mild Spoilers*** Most of the reviews have touched on what makes this film such a fantastic film and also some that take it down a peg.
I think the longeboarding scene is a litmus test of the type of person you truly are. My personal feeling is that if you watch the longboarding scene with wonder and joy than this will be a powerful film to you and easily a film that touches you. If not then this is probably not the film for you.
Walter Mitty starts out slow and in this slow beginning there are many crucial details to pick up that make more sense as the film begins to pick up. The film truly comes alive as Walter plunges into the icy waters of the arctic. I can't help but think of it as a metaphorical plunge into the unknown, with salvation of one type or another as the only possible outcomes.
As some have noted the daydreams go away mid-film. That is the point. As Walter begins to experience life in the truest sense he has no need for daydreams. I honestly felt that this is the entire point of the Film. Another reviewer stated that Walters real-life adventures are more entertaining than his day-dreams. To this I agree entirely. Walters life sequences are unrealistic, beautiful and captivating. There is no real possibility that they would happen and yet they are shot so beautifully that they are easy for US, the audience to have our own Walter Mitty day- dream moments. In those moments we think about and take stock of our life.
I think that this is the real power of the film is to reflect on moments of the film. From the major scenes to the closing credits and their uniqueness. The credits and photography are the most beautiful I can remember seeing on film.
Go into this film with an open mind and appreciation for life a you will leave with a sense of wonder, more perspective and joy than you entered with.