Being Lucas' first endeavor, I had to watch it. The premise of a future inground world ruled by a computer, nuh! Did not entice me but I followed through. It is a sllloooowww developing plot with some interesting hooks from time to time like: the computer generates a Christ-like image to the citizens who pray to it, and the computer responds with slogans such as "be good, consume often". There are some visual effects that I doubt are GCI generated but they are ok. Duval's role is almost a catatonic, except for the small scenes where he engages in sex (forbidden by society). Pleasance's is a little more dramatic. Frankly, I nodded back and forth the first 45 mins or longer, but I refused to stop the flick. Glad I finished it, so I knew what it is about.
Considering it is a 1971 film, I feel it is quite good, but the plot, storyline, rhythm, editing (Lucas'), performance and the rest, looks outdated right away. Definitely, this is not a timeless piece as his next films.
I feel this is a good movie to watch with friends while snacking, drinking and having a good time because otherwise, you may crash before the conclusion. Nevertheless, if you are an admirer of Lucas, as I am, this is a most for you.