Graduate student peer reviewer - worth it?

[GingerbreadLatte]

I received an unsolicited email from an obscure open access journal seeking applications for graduate student peer reviewers.

 

Is this opportunity worthwhile, or am I better off concentrating on my own courses, TAship, and research with my advisor?

[rising_star]

I mean, you could put it on your CV as service, which could be good especially if that section of your CV is empty... But if it's as obscure as you say, I'd worry that they wouldn't have anything relevant for you to review.