Story: Takes off where Baccano! leaves off and adds a slightly new arc with a new character. The format was consistent with with that of Baccano! by starting of with the new situation and character and going through flashbacks and same events in different points of views. The arc was slightly interesting but not quite as intricate as intriguing as the original but given that there were only 3 episodes, this did a pretty good job. The humor, violence, darkly-twisted aura and a slightly portion of the diverse cast that was present in Baccano! remains and keeps the story going despite the lack of much plot. This was entertaining but not quite as intense and profound as the original.
Animation: Consistent with that of the original. Besides the slightly awkward and at times non-fluid movement, animation was quite good.
Sound: As good as the original. Since they kept the soundtrack, the music remained of high quality. The seiyuus remained and maintained a consistent quality of voice acting for the characters.
Characters: Some of the characters were more developed than in the original, which was nice. More was explained about Nice and Jacuzzi while Chane's personality was better fleshed out. The Rail Tracer also had some more depth while still retaining his frightening and disturbing presence. The pairing of the Rail Tracer and Chane was intriguing to watch. The new character was interesting but seemed to me to be a replacement for Lad Russo. Though he lacked the natural aura that Lad had as boss, he was still fairly entertaining as an unintelligent but skilled fighter and psychopath. Lad Russo was briefly shown but I was hoping he could have been more developed as well. Claro and the VP were shown which was a nice touch, giving the anime a cohesive feel.
Main fault with characters lied in the fact that focus was only given to such a small portion of the cast but since the specials were only a few episodes, it would be nearly impossible to develop characters if too much attention was given to the entire cast. However, had they done away with the new character and focused more on the aftermath of all the characters, this might have faired better.
Overall: If you enjoyed Baccano!, this would be worth continuing and offers a nice conclusive ending. The plot was not as intricate and unique as Baccano! and lacks about half the cast with an introduction of a new slightly subpar character. With that realization and trying not to expect something mind-blowing epic as Baccano!, this was still entertaining and for the most part, retained the feel of the original series.