I didnt think it was too bad, although I've never read any Daredevil books. I was under the impression that the film is heavily influenced by Miller's Daredevil work. I was actually planning to pickup the Miller Daredevil trades in the leadup to the film.
As much as I like Jennifer, I'm not sure the part of ELectra really fits right with her. Maybe its just the fact that I've ONLY seen her in Alias.