If you're into Norse mythology and/or alliterative verse, or interested in reading a poetical work by Tolkien set outside of Middle-earth, or interested in seeing the Prof rework some of the sources that inspired him in his own style and language, then yes, it's definitely worth reading. (About the money question - you might try to get it from a library and look for yourself before you decide whether to buy it or not. I was lucky to have it given to me as a birthday present, but I'd probably have bought it anyway.)
There's a thread with some comments and links to more reviews
here.