Do you think child birth classes are helpful and worth the time?

First time mom here. But definitely not my first time dealing with kids. I was 13 and 16 when my brother and sister were born. And I was with my mom the whole time and helped raise them. So I know a lot about babies and kids. But this is my first kid, so I wanted opinions on child birth classes. I’ve heard mixed reviews so far. And I’m just trying to make a decision on whether I should go or if it’s a waste of time. TIA.