This is a production from the Nu Image/Millennium Pictures movie company, and if you have seen any of their other movies, you probably know that on a technical level the movie will succeed. Indeed, "Top Of The World" is a very good-looking movie. The cinematography is great, there are some great locations that will make you wonder how the filmmakers got permission to run amuck on, and there are some good action sequences.
Unfortunately, some key parts of the movie are definitely lacking. The characters could have been better written - as it is, there is no real character that interests you and makes you hope he or she will prevail. These poorly written characters may be why the acting is not always very enthusiastic by the once-in-a-lifetime cast. Also, the various plot twists and character backstabbings become confusing after a while.
Not a terrible movie, but it's kind of lacking. I would only recommend you watch it if nothing else better is playing on TV.