Truman Burbank is the star of "The Truman Show", a 24-hour-a-day "reality" TV show that broadcasts every aspect of his life -- live and in color -- without his knowledge. His entire life has been an unending soap opera for consumption by the rest of the world. And everyone he knows -- including his wife and his best friend -- is really an actor, paid to be part of his life.
Here are some ideas:
It is not an objective critic of the movie, but rather a description of what you felt watching the movie.
You should not hesitate to write more about your emotions than about the movie itself.
And take care not to divulgue any information about the plot!
But in the end, other users are the one rating the comments, so you may do as you feel it should be done.