I'm a huge Corner Gas fan and have really grown to appreciate Canadian Comedy, and while this show is not family friendly at all, I love the style of humor and how fast paced it is. It is not hard to understand, so don't believe the bad reviews. Also, I have seen a lot of comments stating it's full of Canadian slang, and while that may be, it is very easy for Americans to understand. The first episode is the worst in my opinion, so just get past that and you will be fine.
Review of Letterkenny
