This is a very good book for those interested in Beowulf. In fact, it's as close to my idea of an "ideal" version that I can find.
There are several different sections in this book, besides the text of the poem itself. There are technicial discussions on the poetry itself, and a guide to pronounciation. At the rear of the book are discussions of the historical context of the poem, both internal to the poem and external in the world. A lengthy commentary of the poem follows, then a bibliography, and finally a line-by-line glossary of some of the major sections of the poem.
The part that caught my eye was the "dual langauge" edition. The main text consists of the Anglo-Saxon version on the left-handed pages, and a modern English translation on the right-handed pages. The author states that alliteration in the translation was not a concern, and sometimes the translation does not follow the original word-for-word. Within each numbered five-line block, the translation does follow the original, so it's not too hard to follow both the original and the translation.
As a final comment, Caedmon Audio produces an audio edition read by Bessinger, and I find this is to be an excellent compliment to the book.