Jay and Silent Bob Reboot is basically a rehash of their last film with them going to Hollywood to stop a film being made. It is full of cameo appearances with all of Kevin Smith's friends and actors from his other films.
I thought it was decent but kind of the same film over again with a Father/Daughter element thrown in. The laughs are uneven and the story felt kind of like Kevin Smith just getting all his famous friends together for a fun time. It wasn't terrible but I would have no need to revisit it personally.