In our 70's we are old enough to remember the silent movie days, so this movie was an interesting way to show the development of the movie industry. Margot Robbie was for us the most outstanding along with Diago Calva, and generally we thought all stars interpreted their roles well. Whilst it was a long film, it certainly kept you engaged as each characters story unfolded.
The movie world thank goodness has come a long way. Those of a younger generation probably would not appreciate that the scenes at the start of the movie and the latter scenes with Toby Mcguire really occured back in the day.
Go with an open mind and enjoy the ride.