THE FLASH: Loaded with fan service, but is it good?

The Flash is loaded with fan service including Michael Keaton, but is it good and is Ezra Miller a distraction? Ezra Miller has gotten into -- how do we say this? -- legal troubles over the past few years. There was some talk of re-casting the role even AFTER shooting had wrapped, but they chose to stick with what they had. Is the involvement of Ezra Miller too distracting to enjoy this movie? Let's find out!Also, the big question: if you could go back in time and change one seemingly insignificant thing, what would it be?