Well, I'm a big fan of DMC, so I really liked the idea of a manga. I do not own any other mangas yet, but I quite enjoyed reading this one. The story (as far as I can tell) is set before DMC3, and almost fits in with the story of the game (I'm not sure some of the content is the same as the opinions of Capcom, such as Enzo, Dante's 'manager'.
The story firstly explains the beginning of the world, with a brief description of the events with Sparda, and the Demon/Human worlds. Then, it focuses on Dante, who is put on a mysterious job to rescue a girl from a strange house. Vergil and Arkham have appearances, but mainly in the all too familiar library from DMC3:SE.
The story is fairly short to read (I read fast, and it took me about an hour), and the story isn't brilliant, but the artwork is pretty amazing, featuring some cool DMC style scenes.
If you like DMC and you want a little backstory, a short story, and some cool artwork, this is pretty good. If you want detailed backstory that you can read again and again, its probably not your kind of thing.