I like SNL, this was not great
I've been watching SNL since I was a kid, since the days of Phil Hartman and Dana Carvey, and I've also watched and enjoyed the older era from these days that are portrayed in the film.
It felt like this wasn't so much for fans but for people in the show business industry, some films about the movie business also feel this way - like a wink to insiders that feel not so interesting to outsiders. So if you are in the performing arts, maybe this will click more with you.
As a bit of dramatized history it might be interesting, but I thought it would be simply more entertaining.
Performances and likenesses were good, I will admit. Good captures of Chevy Chase, Dan Aykroyd. Especially JK Simmons as Milton Berle, he stole his scenes.