B5 has a closed story arc, so it is always hard to make something new that is worth following an almost perfect main story.
But I read so many bad reviews of lost tales that i hadn't any expectations and so i even was surprised positive. It is nothing special, but I loved all the small details. When Sheridain told from Molari you really could imagine him in front of your inner eyes. It was great how they dealed with Andreas Katsula's and Richard Bigg's death, beyond the rim...