The art is good. I find it adorable when female characters are drawn with the single fang, and it looks great on Kirino. The other female characters were good eye candy as well. The main character is the standard harem male character, reminding me greatly of Okazaki Tomoya or Maebara Keiichi. The sound was good, with a great opening song and a different ending song every episode. Some BGM was excellent, being reminiscent of BGM from Suzumiya Haruhi.
The characters were all quite good. Kirino, outside of her hobby, which I really doubt actually exists (a little sister who digs little sister hentai? You wish Japan) is quite like a little sister, much more than the standard little sisters in anime. Kuroneko, Ayame, and the rest are all good 'real' girls. Some characters take questionable actions during the course of the anime, but I haven't a need to complain as plenty of plot elements are questionable in this anime.
The plot was probably the weakest element of the anime. I for one, am not a fan of anime that focuses on the lives of people who are fans of anime. Stuff like Nogisaka Haruka no Himitsu bores me to death. This had something extra that was different though. It was more about just the brother/sister relationship. Though estranged here, it still focuses just on that, which I enjoyed.
Though I disliked the first four-five episodes or so, the later episodes were all generally humorous and enjoyable. I don't think I would recommend it, however, unless you fit within that demographic I mentioned earlier, and if thats the case, you've probably already seen this anime by now.
