I really wanted to like this film -- it is a great idea! However, the comic undertones of the film quickly gave way to a downbeat drama and the portrayal of one of the most dysfunctional families ever seen on film.
My enjoyment of the movie dwindled as the film went on and on and on. It wasn't really the acting (at least not of the main characters), or even the directing, but rather the writing that was at fault. The script is heavy handed and unbelievable.
On top of this, the writer should have at least visited Canada, or checked out some facts about the country before writing so egregiously. The movie makes it look like Winnipeg is a day's drive from Washington state; Canada border guards do not ask Americans to see their passports at the border - they ask for identification (Social Security number, driver's license, etc.); Winnipeg does not enjoy Chinooks (where weather changes 30 degrees in a day) that's Calgary; By 2004 when this film takes place you would have a hard time finding any Canadian boasting of universal health care; and you really don't hear that tall poppy story up here -- that is a story Americans use to describe Canadians, not a story Canadians use to describe themselves.
Overall, this was a missed opportunity for a very funny, poignant and timely film that really missed its mark. The plot was good, the main actors good, but the actual writing was very clumsy.