"truly worth it"?
To me being a member of law review wasn't that big of a deal. It was 1) a small commitment every other week doing some citechecking, which wasn't fun but helped me learn the bluebook, and 2) writing a comment on a subject of my choosing (that satisfied my paper requirement).
In interviews, employers seem to like law review membership more than they like my membership in the table tennis club.
You can always write a separate comment and submit it to other journals for publication, whether or not you are a member of your school's law review. If you have a few hours each week you don't mind sacrificing, I'd say go for it. That goes for the table tennis club as well.