The trailer doesn't show the elephant bit nor the urinating on the fat person bit or the eating the live rat bit, so no, the trailer is not a pretty good representation of the the movie is. Oh, and the vomit scene. It's a charmer, all right.
I agree completely with Mr. Harris about exhausting. I would change "wonderful" and "strange" to horrible, disgusting, pointless, meandering, badly written, and that Mr. Chazelle has not an original directorial idea in his head. Other than that, I can add that I endured all three hours and eight...