An anime with enough tools to be a great one, but it fails to achieve it.
Trinity Blood is a good anime overall with some great elements and some great flaws.
This serie is a good one because it has a good story with good characters. It´s a story driven anime, it centers in revealing the story piece by piece. It has some action, not enough to appeal to action fans, but it does its job right.
The great elements are the world which is imaginative and the timing of episodes, which is incredibly done, slow to deliver the information, but engaging at the same time, always having a tension scene.
The flaws are fairly basic but annoying at the same time. Somes scenes are incongrous with the rest of the serie if you care to pay attention to details. And some details that deserve a better explanation doesn't get any explanation at all.
Despite that great animation and great music also helps a lot to enhance the qualities of this anime.
But in the end Trinity Blood fails to deliver its final tension scene. Worst thing that can happen to a good anime.