It took me a while before I decided to go see Step Brothers. I'm not sure why, because it looked like something I would like. I like Will Ferrell and the trailer was funny, so it looked like a safe bet. But it seemed there was always something that I wanted to see first. But I finally did and it was worth the wait! I had a lot of fun watching this movie and I laughed a lot. You do have to take into consideration that this is a movie that is anything but politically correct, just in case you are are easily offended and don't like that feeling. Because this is a comedy, I didn't have issues with that aspect of the movie.
As the title indicates, this is the story of two step brothers, who get in this situation when they are fully grown adults. Like, 39-40 years old. But they both still are living at home with a parent and not even considering the maturity aspect of their live. The other step brother is played by John C. Reilly and is a perfect match to Ferrell's type of comedy. Living together is very hard at first, but eventually turns into a good friendship, before turning bad when their parent gets a divorce, but then by the end, things starts getting better once again. The parents are played by Mary Steenburgen and Richard Jenkins.
Most of the movie is around the immaturity of both main characters, separately as well as together. You can easily deduct this from the trailer, but it gets worst. You generally want the trailer to be "G", so that you can air it anytime during the day. Not the "R" it got in the U.S. or even the 13+ it got here in the Quebec province (I guess we get our maturity faster!).
If you like Ferrell and/or Reilly type of comedy, you will enjoy this movie like I did. If you can't stand immature comedy, then obviously, go see something else... ;-) Fortunately for me, my taste in comedy is quite diversified.