hellsing the dawn is a nice addition to the story of Hellsing Ultimate, I think it's rather impresindible, because this explains some holes left unfinished in the anime.
The animation is very good, and interesting story so far, so if you watch Hellsing Ultimate should definitely watch it, and wait until December 2012 to see if with Chapter 10 of the main story its going to be included the rest of this.
