Well, as far as I know, this was given for free in C73, just as a show of gratitude (Those lucky Bastards!
Now about the content, Taimanin Asagi: A Dream hasn't made true yet; Queen's Blade, a "missing page" of the Doujin; Bokusatsu Tenshi Dokuro-chan: As the Anime itself, short and awesome. Introduction, Exposition, Climax and Resolution in just 2 pages; that's amazing. I'd just like to see the part of Dokuro-chan as a 26 pages Doujin; I trust in you Oricomplex!
Final Call: Really worth to Download, and let's pray to see someday the whole Dokuro-chan Doujin.