I had the pleasure of watching this at its Dublin Premiere, followed by a Q&A with Sinéad O'Shea so I might be going over the top but I don't think so.
Cards on the table, I also haven't read any of Edna's works before this movie.
This movie is the perfect biopic-documentary, in that I left desperate to read O'Brien's work.
Most of the movie is readings from diaries provided by Edna, readings of Edna's memoirs and interviews with Edna and her two son. It serves both as a documentary of Edna's work and of the climate of Ireland at the time and that stark difference enriches her diaries, interviews, and her works with such a spirit of rebellion, creativity, and heart-break.