These specials are possibly the funniest shit ever. Here's what I thought about each one on it's own.
Ciel in Wonderland(1+2) - Those two were a little strange but still enjoyable to watch. They were funny, enjoyable and most importantly of all BLACK PEPPER!
Welcome to the Phantomhives - Can I say fangirl? This is the ultimate fangirl episode with everyone telling you how pretty you are all the time. Personally, I'd marry Soma before anyone could blink.
The Making of Black Butler II - This is where the funniest shit ever bit comes into play. It also makes me feel better about it since it shows you
it's all a big act and that everyone who died is alive. All of the little fake scenes at the end are undoubtedly the best part.
Will the Reaper - I liked seeing how the whole reaper process worked. You also got to follow Grell around for an episode, what's better than that?
Spider's Intention - This one was my least favorite because it was all about Alios, who I hate with the fire of a thousand suns. It was interesting though, and made me laugh a few times when the triplets were talking.
I think if you're a big fan of Kuroshitsuji you'll be pleased with these specials. They're done very well and I believe they have a high replay value especially if you like the more comical side of this series.
Ciel in Wonderland (Pt. 1 & 2) - As you may have guessed, this is the Alice in Wonderland story with a Kuroshitsuji twist. Ciel is Alice, Sebastian is the rabbit and... well all of the other Kuroshitsuji characters are included as well. Its good for some laughs and they're definitely not like any normal episodes.
Welcome to the Phantomhives - I didn't really expect much out of
this episode but it was surprisingly like a typical Kuroshitsuji episode except from a first-person point-of-view. Elizabeth is invited to a ball at Ciel's mansion and invites her friend (presumably, you) along with her. A plot unfolds and without giving anything away, its a pretty satisfying episode.
The Making of Kuroshitsuji II - Like Ciel in Wonderland, this one is good for laughs. This takes you behind the scenes of the show, and presents the whole crew as actors instead of their roles in the show. It seemed a little odd at first but then it got pretty funny and charming.
The Tale of William the Shinigami - In case you wondered about Grell and William's history here is the episode that explains just that. Its a story about Grell and William's first mission as shinigami, as well as introduces you to what goes on behind the scenes of becoming a shinigami. I enjoyed this episode because of how it developed these characters further and expanded on your knowledge of the shinigami world.
The Spider's Intention - Basically an episode introducing the Trancy butlers in more details. This episode was pretty cool since it told a little more about the triplets than what the series showed.
This specials were so funny. Especially the making of. So good. Even better then the second series itself. All of them made me laugh except the story of will the shinigami, and the clade/alois one. But that´s only because I don´t like Claude and Alois.
I suppose the review is for those lucky people that managed to find all the ova episodes since most were tooken down by some sites. This is my 1st review, so i'll try to make this look good as much as I can.
Story & Art ( An Acceptable 8)
As expected, the artwork hasen't changed much just like the series and such. So all is still well. The story is good and all but not on every episode. It probably deserves a 7 instead.... but what brought it to an 8 was how the humor and more scenes with the supporting characters replaced it and brought
up the score.
Sound & Character (Nice 9)
The Opening (that is brought in 1 or 2 episodes I think) are the same as the second season. Not every episode has an opening though. The ending isn't all that much looking forward to, but it plays pleasant music by Kalafina. The voice of Alois Trancy's Thompson Brothers (Or whatever those triplet butlers are called :\) is kind of annoying but decent. I've never heard them talk before. The music is great. The characters still remain the same of course. And with more Grell xD.
Enjoyment & Overall ( Just A 7)
It was all good, I think they could've done better on the stories in the episodes, (9), I think one of the episodes was just done from running out of ideas, (8), and they should've they should've made a little clip for ending in the last episode since it seemed kinda empty without one. (7). None-the-less, I'd recommend watching it of course. Not everyone's opinion is the same :).